Hon&Guan 6 Inch Black Backdraft Damper Kit

Upgrade Design The 6 inch damper on both sides of the top and bottom of the two new concave inward pressure rib, and increase the thickness to 0.6mm,to ensure that the product is more solid, not easy to damage., Material The 6 inch backdraft damper is made of a galvanized steel with black powder coat to withstand temperatures up to 140°F, the axis are made of aluminum, while the spring are made of carbon steel. Rugged and corrosion-resistant to keep you venting smoothly, Lightweight Valve Wings The valve wings open under the pressure created by the airflow; when the air flows in the opposite direction, it is automatically closed under the action of the spring, so as to cut off the flow. Rubber ring ensure 100% closure and quiet closing.,Low Noise Silencer: Designed for reducing noise from fans and carbon filter systems, can decrease the noise by up to 50%.,6 Inch Ducting Lightproof: Thick layer of black PVC on Hon&Guan ducting prevents light leaks. Works with exhaust and intake fans, carbon filters and hooded lights which are 6 in diameter