Suggested Retail: $17.97. neverest RK 6 IN Professional Backdraft Shutter Damper Connector Duct - This backdraft exhaust fan damper is compatible with both flexible and non-flexible ventilation ducts, but should be installed in metal ducts. It is ideal for air conditioners, dryers, exhaust and extractor hoods, heating ducts, vents, and various HVAC systems. The damper opens and closes effortlessly at low air volumes, includes a smooth-running spring and an internal foam strip to prevent blade rattling. It can be installed horizontally or vertically. Brand: neverest Model: 4054503005327 -- LOT STICKER: TCE-BOX-BOXTCEE0007-ITEM-49e7d720___LPNNG4CZZZJMV neverest RK 6" Professional Backdraft Shutter Damper Connector Duct Fits Only with Metal Ducts -- 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.