Backdraft Damper, 4
Backdraft Damper, 4 at HorticultureSource.com -
Active Air Backdraft Damper, 4 (ACBD4) Made of galvanized steel, these dampers prevent air leakage into your fan setup. They are easy to install, fit directly onto the ducting, and prevent a back draft of air when the fans are switched off. Manufacturer's Product Information MSRP each $ 17.95 UPC 638104007818 Dimensions 6.6 x 4.1 x 6.8 Case Weight 10 Case Quantity 20