Weatherhood For Blade Diameter 30 in For Cut-Out Height 32 1/2 in For Cut-Out Width 32 1/2 in For Cut-Out Height (With Wall Collar) 35 5/8 in For Cut-Out Width (With Wall Collar) 35 5/8 in Overall Height 34 1/4 in Overall Width 34 1/4 in Overall Depth 25 in Material Steel Thickness 18 ga Finish Galvanized