Shutter Mounted Hazardous Location Exhaust Fan, Assembled Assembled, Blade Diameter 8 in, Blade Material Aluminum, Control Type Toggle Switch, Drive Type Direct Drive, Duct Diameter Not Applicable, Exhaust Airflow @ 0.000 in SP 320 cfm, For -Out Height 11 in, For -Out Width 12 in, For Maximum Wall Thickness 4 in, For Minimum Wall Thickness 4 in, Frame Finish Powder Coated, Frame Material Steel, Guard Finish Chrome, Guard Material Steel, Guard Type Intake