Detachable Backdraft Damper Vent : Easily detachable allows for quick and convenient cleaning and maintenance, ensuring optimal performance at all times Wall Mounted Air Duct Check Valve: Equipped with an air duct adapter ring, this check valve can perfectly match both soft and hard air ducts, improving sealing performance and avoiding any leakage Inline Extractor Fan: Enhance your ventilation system with this inline extractor fan, designed to ensure good sealing performance and optimal throughout your space Improve Sealing Performance: This backdraft damper is designed to improve the sealing performance of your ventilation system, preventing any air leakage and ensuring efficient Avoid Leakage: With this backdraft damper, you can rest assured that your ventilation system will be free from any leaks, allowing for a more effective and efficient, Weight: 0.73413933246 pounds, Manufacturer: QLECXZI