This product is a practical and professional range hood check valve. Made from great quality, wear- resistant and durable, you can reassure to use, not easy to damage, very practical. A nice kitchen accessory, very practical. Cost effectively, you can buy this practical product at an . Features - Color: Silver -Material:Stainless steel - Size: 18.50X18.50X4.20cm/7.27X7.27X1.65in - Size(Clamp): 55.00X1.20X1.00cm/21.61X0.47X0.39in -Note:150 represents a that fits 150mm inside diameter - Well selected high grade material, very durable for a long term use. The check valve is carefully crafted, good texture, not easy to damage. - Exhaust vent cover louvered close automatically when not in use and the range hood outside vent stops unpleasant , noises,or rain flowing back through the dryer exhaust vent cover flap. - This product's appearance design is simple and generous, but the product is reliable and practical. - The product can be used for restaurant's kitchen, personal home kitchen, hotel and some other places. - Cost-effective, you can buy this practical product at an . Package list: 3 x Check Valve 3 Clamp