Exhaust Fan Venturi Frame, For Blade Diameter 24 in, Includes Mounting Bolts, Slotted Motor Base, Overall Depth 9 in, Overall Height 28 in, Overall Width 28 in, Venturi Depth 3 1/2 in, Flange Width 1 in, For -Out Height 26 1/2 in, For -Out Width 26 1/2 in, Frame Finish Galvanized, Material Steel, Opening Diameter 26 1/2 in