Weatherhood For Blade Diameter 10 in For Cut-Out Height 12 1/2 in For Cut-Out Width 12 1/2 in For Cut-Out Height (With Wall Collar) 15 5/8 in For Cut-Out Width (With Wall Collar) 15 5/8 in Overall Height 14 1/4 in Overall Width 14 1/4 in Overall Depth 12 1/2 in Material Steel Thickness 20 ga Finish Galvanized