Exhaust Fan Venturi Frame For Blade Diameter 8 in Includes Zinc Plated Guard Overall Depth 8 3/4 in Overall Height 12 in Overall Width 12 in Venturi Depth 2 in Flange Width 1 in For Cut-Out Height 10 1/2 in For Cut-Out Width 10 1/2 in Frame Finish Galvanized Material Steel Opening Diameter 10 1/2 in