Suggested Retail: $15.22. Hon&Guan 6 Inch Backdraft Damper One-Way Airflow Duct - This 6-inch backdraft damper by Hon&Guan is designed for one-way airflow in various home HVAC applications. It features lightweight valve wings that open under pressure and automatically close when the air flows in the opposite direction, effectively cutting off the flow. The damper is easy to install, with an opening of 150 mm and a length of 88 mm. It is made of galvanized steel and can withstand temperatures up to 140FT. The damper also includes a rubber ring to ensure 100% closure and quiet operation. Brand: Hon&Guan -- LOT STICKER: BB-BOX-PALLETBB557-ITEM-9e7383bd___LPNPMBX2428023 HonGuan 6 Inch Backdraft Damper, OneWay Airflow Duct Damper 6 Inch Ducting Insert Backflow Preventer Duct Draft Blocker -- SIZES ARE ESTIMATED. 7 CALENDAR DAY FULL REFUND GUARANTEE (FROM PRIMARY PICKUP DATE) ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE (FROM PRIMARY PICKUP DATE) IS ALSO AVAILABLE. THE PRIMARY PICKUP DATE IS THE DAY AFTER THE AUCTION ENDS. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.