DAYTON 3HGJ9 Square Fire/Smoke Damper,7-3/4 In. W
$521.99
7.75 In.H 21 In.L 8 In.W GalvStl Fire/Smke Dampr, For Nominal Duct Diameter Not Applicable, Damper Application Fire and Smoke, Number of Panels 1, Overall Height 7 3/4 in, Overall Length 21 in, Rough Opening Shape Square, For Duct Shape Square,...