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Cmi DVBP Vent Plug 61PML201 2IN MINI LOUVER PLAST 61PML301 3IN MINI LOUVER PLAST
Constructed from foam, lightweight and easy to install or replace seasonally, includes a pair of pre-attached vent plugs, help reduce utility bills, designed to fit snugly within the cavities of Lawrence (Sku # 810-4903), Vent-Air (Sku # 810-4911) and Norwesco (Sku # 117-0182) design block vents (not included). 2 in round plastic mini louver installed to provide ventilation in soffits overhangs and the like. Molded grill to protect against the infiltration of pests and insects. 3 in round plastic mini louver installed to provide ventilation in soffits overhangs and the like. Molded grill to protect against the infiltration of pests and insects.
Duraflo 641604 Soffit Ventilator 61RAA15D 1.5IN/FML4 MINI LOUVE Cmi DVBPSM Vent Plug
Installs easily under eaves. Small louvers guard against weather and insect entry. Injection molded UV-resistant polypropylene for impact. White soffit vent. 1-1/2 in round metal mini louver installed to provide ventilation in soffits overhangs and the like. Attached screen mesh to protect against the infiltration of pests and insects. Constructed from foam, lightweight and easy to install or replace seasonally, includes a pair of pre-attached vent plugs, help reduce utility bills, designed to fit snugly within the cavities of Lawrence (Sku # 810-4903), Vent-Air (Sku # 810-4911) and Norwesco (Sku # 117-0182) design block vents (not included).
61PML401 4IN MINI LOUVER PLAST 61RAA20D 2IN/FML6 MINI LOUVER 61RAA25D 2.5IN MINI LOUVER ALU
4 in round plastic mini louver installed to provide ventilation in soffits overhangs and the like. Molded grill to protect against the infiltration of pests and insects. 2 in round metal mini louver installed to provide ventilation in soffits overhangs and the like. Attached screen mesh to protect against the infiltration of pests and insects. 2-1/2 in round metal mini louver installed to provide ventilation in soffits overhangs and the like. Attached screen mesh to protect against the infiltration of pests and insects.
Cmi DVBPXL Vent Plug Duraflo 641608 Soffit Ventilator 61RAA30D 3IN/FML10 MINI LOUVER
Constructed from foam, lightweight and easy to install or replace seasonally, includes a pair of pre-attached vent plugs, help reduce utility bills, designed to fit snugly within the cavities of Lawrence (Sku # 810-4903), Vent-Air (Sku # 810-4911) and Norwesco (Sku # 117-0182) design block vents (not included). Installs easily under eaves. Small louvers guard against weather and insect entry. Injection molded UV-resistant polypropylene for impact. White soffit vent. 3 in round metal mini louver installed to provide ventilation in soffits overhangs and the like. Attached screen mesh to protect against the infiltration of pests and insects.
Maurice Franklin RL-100 Round Screen Louver Maurice Franklin PLB-100 Round Screen Louver 61RAA40D 4IN/FML12 MINI LOUVER
We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs - most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. One-piece white polyethylene. Recommended for moisture control in sidewalls construction or other restricted areas. 4 in round metal mini louver installed to provide ventilation in soffits overhangs and the like. Attached screen mesh to protect against the infiltration of pests and insects.
Maurice Franklin RLW-100 Round Screen Louver Maurice Franklin RL-100 Round Screen Louver Maurice Franklin RLW-100 Round Screen Louver
We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs - most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs.
Maurice Franklin RL-100 Round Screen Louver Maurice Franklin RLB-100 Round Screen Louver Maurice Franklin PLB-100 Round Screen Louver
We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. One-piece white polyethylene. Recommended for moisture control in sidewalls construction or other restricted areas.
Maurice Franklin PLW-100 Round Screen Louver Duraflo 620808 Square Gable Vent Maurice Franklin PLW-100 Round Screen Louver
One-piece white polyethylene. Recommended for moisture control in sidewalls construction or other restricted areas. Provides long-term durability and function to home. Injection molded UV-resistant polypropylene. White gable vents. One-piece white polyethylene. Recommended for moisture control in sidewalls construction or other restricted areas.
Maurice Franklin RL-100 Round Screen Louver 61RAA60D 6IN MINI LOUVER ALUMI Maurice Franklin RLB-100 Round Screen Louver
We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. 6 in round metal mini louver installed to provide ventilation in soffits overhangs and the like. Attached screen mesh to protect against the infiltration of pests and insects. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs.
Maurice Franklin RLW-100 Round Screen Louver Maurice Franklin RLB-100 Round Screen Louver Maurice Franklin RLW-100 Round Screen Louver
We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs - most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs - most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs.
Duraflo 6065G Slant Back Roof Ventilator Maurice Franklin RL-100 Round Screen Louver Maurice Franklin PLW-100 Round Screen Louver
Polypropylene material. Ideal for steep pitched roofs. Low profile and a stair step screen to provide more airflow in a smaller vent. 17-1/2 in x 18-1/2 in flashing with 4.3 in H. 61 sq-in of net-free area. UV resistant polypropylene. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. One-piece white polyethylene. Recommended for moisture control in sidewalls construction or other restricted areas.
Duraflo 620812 Rectangle Gable Vent Maurice Franklin RL-100 Round Screen Louver Duraflo 6050BR Square Top Type B Roof Ventilator
Provides long-term durability and function to home. Injection molded UV-resistant polypropylene for impact. White gable vents. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs - most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. Low profile style. Molded in screen. Angled screen that prevents birds from nesting. Wide, flexible flange will not crack on installation, even in cold weather. Angled throat to effectively deflect water. Injection molded UV resistant polypropylene.
Duraflo 6050G Square Top Type B Roof Ventilator Duraflo 6050BL Square Top Type B Roof Ventilator Duraflo 6050WW Square Top Type B Roof Ventilator
Low profile style. Molded in screen. Angled screen that prevents birds from nesting. Wide, flexible flange will not crack on installation, even in cold weather. Angled throat to effectively deflect water. Injection molded UV resistant polypropylene. Low profile style. Molded in screen. Angled screen that prevents birds from nesting. Wide, flexible flange will not crack on installation, even in cold weather. Angled throat to effectively deflect water. Injection molded UV resistant polypropylene. Low profile style. Molded in screen. Angled screen that prevents birds from nesting. Wide, flexible flange will not crack on installation, even in cold weather. Angled throat to effectively deflect water. Injection molded UV resistant polypropylene.
620816 8X16 WHT GABLE VENT STA Maurice Franklin RLB-100 Round Screen Louver Maurice Franklin RLW-100 Round Screen Louver
Installed on an exterior, vertical wall to provide attic ventilation, normally positioned in a roof gable. Louvered with a molded grill to protect against infiltration of birds, pests, weather and insects. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs. We use a minimum of 0.02 ga aluminum for our round aluminum louvers, screens and plugs, most manufacturers use a thinner gauge, which leads to a weaker product. This thick, durable material maximizes lifespan and ensures proper ventilation needs.
Bestvents 500BR Manual Foundation Vent with Damper LL Buildsite DA1212 Square Dual Louver Duraflo 6065BL Slant Back Roof Ventilator
Witten Vent Foundation Vent, Rough Opening Size: 8 in L x 16 in W, Brown One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. Polypropylene material. Ideal for steep pitched roofs. Low profile and a stair step screen to provide more airflow in a smaller vent. 17-1/2 in x 18-1/2 in flashing with 4.3 in H. 61 sq-in of net-free area. UV resistant polypropylene.
Duraflo 6065BR Slant Back Roof Ventilator Duraflo WeatherPRO PRO50 Roof Ventilator Duraflo WeatherPRO PRO50 Roof Ventilator
Polypropylene material. Ideal for steep pitched roofs. Low profile and a stair step screen to provide more airflow in a smaller vent. 17-1/2 in x 18-1/2 in flashing with 4.3 in H. 61 sq-in of net-free area. UV resistant polypropylene. With the WeatherPRO? Series PRO50 you no longer need to worry about foul weather. The unique baffle system within the WeatherPRO? Series PRO50 wards off driving snow and blistering rain. With the WeatherPRO? Series PRO50 you no longer need to worry about foul weather. The unique baffle system within the WeatherPRO? Series PRO50 wards off driving snow and blistering rain.
Duraflo 621212COMB Square Rectangular Combined Gable Vent LL Buildsite DA1212W Square Dual Louver Duraflo 6065WW Slant Back Roof Ventilator
Provides long-term durability and function to home. Injection molded UV-resistant polypropylene. White gable vents. One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. Polypropylene material. Ideal for steep pitched roofs. Low profile and a stair step screen to provide more airflow in a smaller vent. 17-1/2 in x 18-1/2 in flashing with 4.3 in H. 61 sq-in of net-free area. UV resistant polypropylene.
Duraflo 646015 Soffit Exhaust Ventilator Duraflo WeatherPRO Turbo Retro Fit Type B Replacement Turbine LL Buildsite DA1218 Rectangle Dual Louver
No need to penetrate the roof or wall. For venting bathrooms or dryers. Flapper lets out hot moist air while keeping out cold air. Mounts flush to soffit for virtually invisible installation. Meets CSA codes and standards. Connects to either 4 in or 5 in ducting or flex hose. Overall size 6-3/4 in x 5-3/4 in. Installed on a sloped, shingled roof to exhaust bathroom fans by the means of a roof penetration. Includes internal damper to reduce backdraft and an exterior grill to prevent the infiltration and nesting of birds, vermin and insects. One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting.
Builders Edge 140037079001 Scallop Exhaust Ventilator 6075G  GREY #075 ROOF VENT SQU Duraflo 6075BR Square Top Type B Roof Ventilator
A high-quality finish, thanks to the patented lock-on trim ring. Available with scalloped or square corner details & fits 4" exhaust pipe. Patented exhaust flaps stay closed when not in use. Installed on a sloped, shingled roof to ventilate hot, moist attic air as a part of a balanced ventilation system. Installed within 24 in of the roof's peak. Low profile style. Molded in screen. Angled screen that prevents birds from nesting. Wide, flexible flange will not crack on installation, even in cold weather. Angled throat to effectively deflect water. Injection molded UV resistant polypropylene.
LL Buildsite DA1218W Rectangle Dual Louver VENT FOUNDATION BLOCK GREY    Duraflo 621218 Rectangle Gable Vent
One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. Installed in the block foundation to provide ventilation of crawlspaces and under home spaces. Fits standard, metric and queen brick and block. Provides the ability to open and close for changes in needs based on seasonality. Provides long-term durability and function to home. Injection molded UV-resistant polypropylene for impact. White gable vents.
Duraflo 646015BR Soffit Exhaust Ventilator Builders Edge 140016774001 Hooded Ventilator Gaf BVSII Block Foundation Vent
No need to penetrate the roof or wall. For venting bathrooms or dryers. Flapper lets out hot moist air while keeping out cold air. Mounts flush to soffit for virtually invisible installation. Meets CSA codes and standards. Connects to either 4 in or 5 in ducting or flex hose. Overall size 6-3/4 in x 5-3/4 in. Builders Edge Hooded Ventilator, Net Free Ventilating Area: 12 sq-in, Installation Type: Side Wall Master Flow? foundation vents help to remove damaging moisture that can lead to mold growth and structural decay in the foundation area of the home.
LL Buildsite DA1424 Dual Louver Bestvents B-EBLACK(MB) Foundation Vent Energy Saver 306MGR Foundation Vent With Damper
One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. Replaces old-style manual vents. Fits standard 8 in x 16 in vent openings. Automatically opens at 70 deg F and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 sq-in net-free area. High-density thermo-plastic construction. Stainless steel and corrosion-resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8 in x 16 in. Replaces old-style manual vents. Fits standard 8 in x 16 in vent openings. Automatically opens at 70 deg F and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 sq-in net-free area. High-density thermo-plastic construction. Stainless steel and corrosion-resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8 in x 16 in.
Energy Saver B-E BROWN (MB) Foundation Vent With Damper Bestvents 304LGR Foundation Vent Bestvents 315CBL Replacement Foundation Vent
Replaces old-style manual vents. Fits standard 8 in x 16 in vent openings. Automatically opens at 70 deg F and closes at 40 (approximately). The key mechanism, bi-metal coil, fully enclosed in protective cover. Stainless steel compression spring with 1 adjustable screw for easy installation. 65 sq-in net-free area. High-density thermo-plastic construction. Stainless steel and corrosion-resistant metal parts. Heavy-duty aluminum mesh screen, front and back. No electrical hook-up required. 8 in x 16 in. With 18 in lintel for new construction. Fits standard 8 in x 16 in vent openings. High-density thermo-plastic construction. Automatically opens at 70 deg F, closes at 40 (approximately). Key working mechanism, bi-metal coil, fully enclosed by protective cover. No electrical hook-up required. Stainless steel and corrosion-resistant metal parts. 62 sq-in net-free area. Heavy-duty aluminum mesh screen, front and back. 8 in x 16 in. With 1 in W frame for new construction or to replace old foundation vents. Fits standard 8 in x 16 in concrete block opening. Operates automatically without electricity, opens at 70 deg F, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8 in heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion-resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 sq-in net-free area. 8 in x 16 in.
LL Buildsite DA1424W Dual Louver Bestvents 315CBR Replacement Foundation Vent Bestvents 315CGR Replacement Foundation Vent
One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. With 1 in W frame for new construction or to replace old foundation vents. Fits standard 8 in x 16 in concrete block opening. Operates automatically without electricity, opens at 70 deg F, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8 in heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion-resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 sq-in net-free area. 8 in x 16 in. With 1 in W frame for new construction or to replace old foundation vents. Fits standard 8 in x 16 in concrete block opening. Operates automatically without electricity, opens at 70 deg F, closes at 40 (approximately). Simple homeowner/DIYer snap-in installation, with color matched set screws for additional stability. Removable back for maintenance and cleaning. Screened with 1/8 in heavy-duty aluminum mesh. High-density thermo-plastic construction. All metal parts are corrosion-resistant stainless steel. Aluminum louvers. No mortar required for installation. 62 sq-in net-free area. 8 in x 16 in.
Gaf FVRABL Foundation Vent LL Buildsite DA1824 Dual Louver 626045-00 18X18INWHT GABLE VEN
Master Flow? foundation vents help to remove damaging moisture that can lead to mold growth and structural decay in the foundation area of the home. One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. Installed on an exterior, vertical wall to provide attic ventilation, normally positioned in a roof gable. Louvered with a molded grill to protect against infiltration of birds, pests, weather and insects.
Builders Edge 140057575001 Intake/Exhaust Vent GABLE VENT 15X15IN OUTSIDE DIM GABLE VENT 22IN WHT OCTGN VNYL
Use for venting bathroom and kitchen exhaust fans, not for use as dryer or furnace vent, durable, maintenance free, UV stabilized and constructed with color molded-through so they wont scratch, flake or fade, full fiberglass screening for complete insect protection, net-free area 12 sq-in. Lifetime limited warranty. Made in USA. Drip channel drains water to the front of the siding to eliminate wood rot. Wide trim ring, removable template, large flange and level lines. Injection-molded UV-resistant polypropylene for impact. Molded in screen prevents insects and bees from nesting in gable vent. Molded in screen cannot become unglued. Deep wood grain finish enhances appearance for a real wood look. Weeping holes prevent condensation or moisture from remaining trapped. Suitable for use with vinyl or aluminum siding, shake, stucco or brick. 44 sq-in of net-free area. Drip channel drains water to the front of the siding to eliminate wood rot. Wide trim ring, removable template, large flange and level lines. Injection-molded UV-resistant polypropylene. Molded in screen prevents insects and bees from nesting in gable vent. Molded in screen cannot become unglued. Deep wood grain finish enhances appearance for a real wood look. Weeping holes prevent condensation or moisture from remaining trapped. Suitable for use with vinyl or aluminum siding, shake, stucco or brick. 58 sq-in of net-free area. Includes a 3 in snap on trim ring for easy installation.
GABLE VENT 22IN WHT RND VINYL LL Buildsite DA1824W Dual Louver LL Buildsite PT-6 Replacement Thermostat
Drip channel drains water to the front of the siding to eliminate wood rot. Wide trim ring, removable template, large flange and level lines. Injection-molded UV-resistant polypropylene. Molded in screen prevents insects and bees from nesting in gable vent. Molded in screen cannot become unglued. Deep wood grain finish enhances appearance for a real wood look. Weeping holes prevent condensation or moisture from remaining trapped. Suitable for use with vinyl or aluminum siding, shake, stucco or brick. 55 sq-in of net-free area. One-piece aluminum central louver panel construction with pre-punched louvered vanes. Designed for flush or recessed mounting. Automatic adjustable. Inline with vent. Outside arrow indicator for easy changes. Compatible with all single speed power vents. 4.4 A, 120 V, 60 Hz.
GAF Master Flow 12GNV4B Roof Mount Goose Neck Ventilator GABLE VENT 18X24IN WHITE RECT GAF Master Flow GT12E External Braced Deluxe Turbine Head
Ideal for appliances needing ventilation. Heavy-duty screen deters animals and insects, large flashing for added leak protection. Black. Drip channel drains water to the front of the siding to eliminate wood rot. Wide trim ring, removable template, large flange and level lines. Injection-molded UV-resistant polypropylene for impact. Molded in screen prevents insects and bees from nesting in gable vent. Molded in screen cannot become unglued. Deep wood grain finish enhances appearance for a real wood look. Weeping holes prevent condensation or moisture from remaining trapped. Suitable for use with vinyl or aluminum siding, shake, stucco or brick. 44 sq-in of net-free area for 12 in x 18 in and 18 in x 24 in. 74 sq-in of net-free area for 22 in x 28 in. Rough cut opening is 12-1/2 in x 18-1/4 in. Fits most brands of turbine bases. No GT12E Dade County Approval 04-0618.01.
ROOF VENT GRAY TURBINE REPL   GAF Master Flow H1 Fully Adjustable Humidistat Duraflo 626075-00 Small Rectangular Gable Vent
Installed on an existing base from a whirly bird or turbine vent, both 12 or 14 in. Intended for a sloped, shingled roof to ventilate hot, moist attic air as a part of a balanced ventilation system. Installed within 24 in of the roof's peak. Wires parallel to thermostat, allows moisture-laden winter air to be discharged. Thermostat will operate unit during the summer months and in the winter months humistat will takeover. Settings for humidistat are minimum 80%, normal 42% and maximum 20 %. Fits 2000 series. Drip channel drains water to the front of the siding to eliminate wood rot. Wide trim ring, removable template, large flange and level lines. Injection-molded UV-resistant polypropylene for impact. Molded in screen prevents insects and bees from nesting in gable vent. Molded in screen cannot become unglued. Deep wood grain finish enhances appearance for a real wood look. Weeping holes prevent condensation or moisture from remaining trapped. Suitable for use with vinyl or aluminum siding, shake, stucco or brick. 44 sq-in of net-free area for 12 x 18 in. Rough cut opening is 12-1/2 x 18-1/4 in.
GAF Master Flow SGM20 Shutter Power Gable Ventilator GAF Master Flow GIC12WW Internal Braced Rotary Turbine Ventilator GAF Master Flow GIC12BL Internal Braced Rotary Turbine Ventilator
Use with all attic power gable mount vents, moving air opens the louvers only when the power vent is operating, when vent is off, shutter helps prevent infiltration of rain, snow, insects, etc, maintenance-free white aluminum construction, can be painted if desired. Permanently lubricated track system, upper and lower stainless steel ball bearings prevents metal-to-metal contact, encased to help prevent dirt, dust, sand and other foreign materials from damaging bearings for long life, less friction, smoother spin and wear resistance. Heavy-duty steel spider braces and case-hardened steel shaft for long-lasting strength/durability. Simple, mechanically-locked, two-piece head/base for faster, easier installation. Pre-punched bottom/crimped collar of one-piece base fits tighter, makes installation easier and allows for adjustability up to 12/12 pitch without removing turbine. Extra-large flashing and head with included bottom ring for easier installation and better weather protection. Double ribbed vanes, with convex top, direct even wind-driven rain away from the unit. Dade County/Texas Department of Insurance approved. Permanently lubricated track system, upper and lower stainless steel ball bearings prevents metal-to-metal contact, encased to help prevent dirt, dust, sand and other foreign materials from damaging bearings for long life, less friction, smoother spin and wear resistance. Heavy-duty steel spider braces and case-hardened steel shaft for long-lasting strength/durability. Simple, mechanically-locked, two-piece head/base for faster, easier installation. Pre-punched bottom/crimped collar of one-piece base fits tighter, makes installation easier and allows for adjustability up to 12/12 pitch without removing turbine. Extra-large flashing and head with included bottom ring for easier installation and better weather protection. Double ribbed vanes, with convex top, direct even wind-driven rain away from the unit. Dade County/Texas Department of Insurance approved.