DAYTON 2TGG2 Rectangular Fire Damper,11-3/4x23-3/4 In
$126.99
23.75 In.H 11.75 In.W 3.7 In.L GStl Fire Dampr, Damper Application Fire, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 4000 fpm, Overall Height 11 3/4 in, Rough Opening Diameter Not Applicable, Rough Opening Shape...