Soffit vents exterior,Vent cover, External Roof Round Air Turbines Ventilator Cover, Chimney Hood Rings Air Vent Attic Ventilator Wind Turbines, For Houses Factory(110mm 4.3in)

▶ High-grade stainless steel dual ball bearings with integrated molded shields to protects the bearings, inner and outer brackets; permanently lubricated ball bearings. The fan can be installed on a slope of 0-22.5 degrees, flat or inclined. ▶ The roof ventilator smoke extractor is made of high-quality 304 stainless steel, which is not easily deformed, has a smooth surface and has no sharp angles. Curved fan blades provide less wind resistance and smooth rotation ▶ Strong enough to withstand 200 km/h wind speed and 100 kg load without deformation or damage. High ventilation efficiency, light operation, preventings rainwater intrusion ▶ Weather Resistants. Provides the performance of standard roof ventilation systems, releasing trapped air in your roof space in just minutes Wall mount air vent-- the specially designed air vent prevents rain and excessive wind from entering the ventilation system.