Description 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 ventilator accessory, very practical. Cost effectively, you can buy this practical product at an affordable price. 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 pipe 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 odors, 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 affordable price. 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 odors, 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 affordable price.