Wall Collar, For Blade Diameter 24 in, For Cut-Out Height 29 5/8 in, For Cut-Out Width 29 5/8 in, Thickness 18, Material Steel, Overall Depth 18 1/2 in, Overall Height 28 1/4 in, Overall Width 28 1/4 in, Finish Galvanized, Includes (4) Mounting Angle,...