DAYTON 45C663 60 in Backdraft Damper / Wall Shutter, 60-1/2 in x 60-1/2 in
$841.99
63 In.H-W 6 1/4 In.L Extrd Alu Backdraft Dampr, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 2, Maximum Air Velocity 3000 fpm, Overall Height 63 in, Rough Opening Diameter 60 1/2 in,...