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 Cut-Out Height 11 in For Cut-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