Introducing our premium 4 in. roof vent with backdraft damper, a versatile and efficient ventilation solution designed to meet your home's needs. This high-performance vent boasts an impressive airflow of up to 75%, significantly surpassing other market offerings that often fall below 50% in airflow efficiency. Crafted from high-quality galvanized steel and coated with a corrosion-resistant polyester powder, the vent ensures durability and long-lasting use, providing excellent protection against rust and wear.The vent features a 120mm x 90mm mesh cover with a grid gap of about 3mm, effectively preventing small animals or birds from entering your home. Its design is optimized for maximum airflow and protection, making it ideal for use with kitchen and roof exhaust venting systems. It can be seamlessly integrated with 4 in. duct and exhaust fans, enhancing the ventilation efficiency of your home.Installation is a breeze with the vent's convenient pipe extension and four mounting holes, providing a secure and stable connection to your 4 in. bathroom exhaust fan roof jack. With its robust construction, precision engineering, and cost-effective pricing, this roof vent represents an exceptional value for money, offering superior performance and reliability without compromising on quality or functionality. Choose our 4 in. roof vent today and experience the benefits of enhanced ventilation in your home. Color: Black.