HYKE 4 Inch Roof Vent, Roof Vents for Houses, Carbon Steel Roof Exhaust Vent with Damper, Diameter Collar Removable Vent for Attic Ventilation

4-inch -corrosion Roof Vent The roof exhaust vent is constructed from carbon steel and polyester powder , and extra layer of baking paint offers -corrosion and -rust 【Ventilation effect】The specially designed roof vent cover provides ventilation effect, increases vent openings, and has air exchange efficiency. Equipped with air door, the airflow can reach 60% 【One-way damper and plate】The roof vent includes 85mm*75mm cover, the thickness is approximately 3mm and has been enhanced, the structure is more stable, prevents , snow, small animals or birds from entering, minimizes the of air, and controls indoor air humidity 【Stable and long service life】Constructed from carbon steel, and , resistant to and external , and capable of enduring various climatic conditions in different areas. or low temperatures will not impact the of the product 【 to install】The vent cover is fitted with -to-install nut holes, which is more straightforward to install than other vent covers, time and . together with exhaust fans and ventilation ducts for air exchange, supplying fresh air for your .（Additionally, the detachable cover is more convenient for cleaning）