DAYTON 2TFZ4 Round Fire Damper,13-5/8 In. D,165 Deg F
$166.99
4 In.dia Galvanized Steel Fire Damper, Damper Application Fire, For Nominal Duct Diameter 4 in, Frame Material Galvanized Steel, Number of Panels 1, Maximum Air Velocity 2000 fpm, Overall Height Not Applicable, Rough Opening Diameter 4 in, Rough...