DAYTON 45C666 36 in Agricultural Wall Exhaust Shutter, 39-1/2 in x 39-1/2 in
$227.99
42 In.H-W 5.75 In.L Aluminum Exhaust Shutter, Damper Application Backdraft, For Nominal Duct Diameter Not Applicable, Frame Material Aluminum, Number of Panels 2, Maximum Air Velocity 2500 fpm, Overall Height 42 in, Rough Opening Diameter 39 1/2 in,...