Dayton Steel 42"W 12"H Fixed Roof Curb 2RB81

Roof Curb, For Fan Base Size 42 in, Curb Height 12 in, Curb Inside Width 37 1/2 in, Curb Outside Width 40 1/2 in, Material Steel, Standards UL 705, For Use With 42 in Square Base, Adjustability Fixed, Ventilation Type Nonventilated, Application General Exhaust, Curb Inside Length 37.5, Curb Outside Length 40 1/2 in, Curb Shape Square, Damper Tray Size 35 in x 35 in, Features Flashing Flange, One Welded Corner, Wood Nailer, Finish Galvanized, Flashing Flange Width 2 in