DAYTON 53DR20 20 in Backdraft Damper / Wall Shutter, 22-1/2 in x 22-1/2 in
$68.09
25 In.H-W 6 In.L Aluminum Backdraft Damper, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height 25 in, Rough Opening Diameter 22 1/2...