In-Line Duct Blower Wheel Type Backward-Inclined Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 13 1/2 in Airflow @ 0.125 in SP 1 650 cfm Airflow @ 0.250 in SP 1 562 cfm Airflow @ 0.375 in SP 1 460 cfm Airflow @ 0.500 in SP 1 326 cfm Airflow @ 0.750 in SP 955 cfm Maximum Inlet Air Temperature 160 Degrees F Shaft Diameter 3/4 in Bearing Type Sealed Pillow Block