Shutter Mount Exhaust Fan, Assembled Assembled, Blade Diameter 20 in, Blade Material Aluminum, Control Type Pull Chain, Drive Type Direct Drive, Duct Diameter 20 3/8 in, Exhaust Airflow @ 0.000 in SP 2, 235 cfm, For Cut-Out Height 20 1/2 in, For Cut-Out Width 20 1/2 in, For Maximum Wall Thickness 5 1/2 in, For Minimum Wall Thickness 3 in, Frame Material Aluminum, Guard Finish Chrome, Guard Material Steel, Guard Type Exhaust, Housing Material Aluminum, Steel, Housing Finish Galvanized. This item has been restricted from sale in the following state (s): []