Exhaust Fan Venturi Frame, For Blade Dia. 18 in, Height 22 in, Width 22 in, Max. Depth 9 in, Dia. Opening Required 20 1/2 in, Flange Width 1 in, Venturi Depth 3 in, Frame Material Steel, Frame Finish Galvanized, Dimension A 22 in, Dimension B 4 in, Dimension C 18 1/2 in, Dimension D 9 1/2 in, Includes Mounting Bolts and Slotted Motor Base To Accept 48 Or 56 Frame Motors. This item has been restricted from sale in the following state (s): []