4" Backdraft Damper
4" Backdraft Damper at HorticultureSource.com -
Atmosphere 4" Backdraft Damper (VTBDD4) Atmosphere’s all new galvanized steel back draft dampers fit directly into the duct simplifying installation. They feature a shaft for each of the 2 flaps so to prevent jamming. Also, the flaps close onto a perimeter gasket ensuring the best air seal and quiet operation. Manufacturer's Product Information MSRP each $ 22.2 UPC 628507200039 Dimensions 6.5 x 3 x 6.5 Case Quantity 1