Shutter Mounted Hazardous Location Exhaust Fan, Assembled Assembled, Blade Diameter 24 in, Blade Material Aluminum, Control Type Toggle Switch, Drive Type Direct Drive, Duct Diameter Not Applicable, Exhaust Airflow @ 0.000 in SP 5,500 cfm, For Cut-Out Height 27 in, For Cut-Out Width 27 in, For Maximum Wall Thickness 6 in, For Minimum Wall Thickness 6 in, Frame Finish Powder Coated, Frame Material Steel, Guard Finish Chrome, Guard Material Steel, Guard Type Intake