DAYTON 2C522 20 in Backdraft Damper / Wall Shutter, 20-1/2 in x 20-1/2 in
$60.25
23 In.H-W 6 In.L Aluminum Wall Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 23 in, Rough Opening Diameter 20...