Wall Collar, For Blade Diameter 30 in, For Cut-Out Height 35 5/8 in, For Cut-Out Width 35 5/8 in, Thickness 18, Material Steel, Overall Depth 19 1/2 in, Overall Height 34 1/4 in, Overall Width 34 1/4 in, Finish Galvanized, Includes (4) Mounting Angle,...