[Upgraded] Hon&Guan Duct Damper 6 inch, Backdraft Damper One-Way Airflow Backflow Preventer for 6 Inch Duct Dryer Vent Hose-2pcs — Open-Box, 35% Off

【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, and 2 springs instead of 1 spring in the market, ensuring that the product is more robust and less prone to damage

【Quality Material】The 6 inch backdraft damper is made of a galvanized steel 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

【Installation method】The vent damper 6 inch has an opening of 150 mm and a length of 88 mm. When installed horizontally, the spring should be positioned horizontally so that it can be opened and closed optimally.

【Wide Applications】The 6 inch duct draft blocker valves can be inserted into ventilation dryer vent hose. Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications

【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.