Cabinet Exhaust Fan Assembled Assembled Blade Diameter 48 in Blade Material Steel Drive Type Belt Drive Duct Diameter Not Applicable Exhaust Airflow @ 0.000 in SP 26 611 cfm For Cut-Out Height 55 1/4 in For Cut-Out Width 55 1/4 in Frame Finish Zinc Plated Frame Material Steel Guard Finish Galvanized Guard Material Steel Guard Type None Housing Material Steel Housing Finish Galvanized Includes (4) Wall Mounting Angles Includes Dehumidistat No Maximum Airflow 26 611 cfm