Exhaust Fan Venturi Frame For Blade Diameter 12 in Includes Mounting Bolts Slotted Motor Base Overall Depth 8 3/4 in Overall Height 16 in Overall Width 16 in Venturi Depth 2 1/2 in Flange Width 1 in For Cut-Out Height 14 1/2 in For Cut-Out Width 14 1/2 in Frame Finish Galvanized Material Steel Opening Diameter 14 1/2 in