Are you still looking for a practical and reliable range hood check valve? If you are, then you can see our product. This check valve is an anti- range hood base, very sturdy, not easy to damage, durable and very practical. Easy to install it to your kitchen . workmanship and materials ensure a and perfect details. Features - Color: Silver -Material:Stainless Steel - Size: 22.00X22.00X4.20cm/8.65X8.65X1.65in - Size(Clamp): 64.00X1.20X1.00cm/25.15X0.47X0.39in -Note:180 represents a that fits 180mm inside diameter - The check valve is made of , which is and anti-deformation. - Wide range of applications. External wall vents are perfect for ventilation systems, air conditioning units, kitchen vents, home wall vents, and industrial use. - By gravity and spring, the check valve is closed and the flue is blocked. The product has fine workmanship. - The check valve prevents most cold air from entering. The dryer vent cover opens automatically by means of over pressure. - The product is simple and convenient to use, easy to install and remove. The product has practical functions. Package list: 1 x Check Valve 1 Clamp