DAYTON 4FZJ7 20 in Backdraft Damper / Wall Shutter, 20-1/2 in x 20-1/2 in
$297.99
23 In.H-W 5 1/4 In.L SS Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Stainless Steel, Number of Panels 1, Maximum Air Velocity 2500 fpm, Overall Height 23 in, Rough Opening Diameter 20 1/2 in,...