Weatherhood, For Blade Diameter 8 in, For -Out Height 10 1/2 in, For -Out Width 10 1/2 in, For -Out Height (With Wall Collar) 13 5/8 in, For -Out Width (With Wall Collar) 13 5/8 in, Overall Height 12 1/4 in, Overall Width 12 1/4 in, Overall Depth 11 1/4 in, Material Steel, Thickness 20 ga, Finish Galvanized