Wall Collar, For Blade Diameter 48 in, For -Out Height 55 5/8 in, For -Out Width 55 5/8 in, Thickness 18, Material Steel, Overall Depth 23 1/2 in, Overall Height 54 1/4 in, Overall Width 54 1/4 in, Finish Galvanized, Includes (4) Mounting Angle, (4) Side Panel