Wall Collar, For Blade Diameter 16 in, For Cut-Out Height 21 5/8 in, For Cut-Out Width 21 5/8 in, Thickness 20 ga, Material Steel, Overall Depth 12 1/2 in, Overall Height 20 1/4 in, Overall Width 20 1/4 in, Finish Galvanized, Includes (4) Mounting Angle, (4) Side Panel. This item has been restricted from sale in the following state (s): []