6 Inch Backdraft Damper with Aluminum Foil Tape for Range Hoods & Grow Tents

【Durable Material】 The 6 inch backdraft damper make of galvanized steel with black powder coat finish and spring-loaded aluminum damper blades.And the overall length is 128mm, which is longer than most products.【Easy Installation】The position of the The 6 inch duct draft blocker valves spring should be horizontal for horizontal installations so that it can open and close optimally. And the length of the side tie bar is less than 3mm, so don’t need to worry about damaging the duct during installation.【Wide Applications】Back draught valves can be inserted into havc ducting which are flexible or non-flexible. Designed for use with range hoods, exhaust fans, vents and other home havc 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.【Backdraft Shutter】Hon&Guan vent damper 6 inch designed to improve ventilation by preventing air from re-circulating when the fans are not in use, An internal foam ring and two external fastening rubber rings help to increase air tightness.