Blower, Wheel Type Backward-Inclined, Drive Type Belt Drive, Includes Drive Package Yes, Assembly Unassembled, Wheel Diameter 15 in, Airflow @ 0.250 in SP 4,402 cfm, Airflow @ 0.500 in SP 4,289 cfm, Airflow @ 0.750 in SP 4,170 cfm, Airflow @ 1.000 in...