High Pressure Blower Wheel Type Radial Drive Type Direct Drive Includes Drive Package Yes Assembly Assembled Wheel Diameter 7 3/4 in Airflow @ 0.250 in SP 283 cfm Airflow @ 0.500 in SP 274 cfm Airflow @ 1.000 in SP 256 cfm Airflow @ 1.500 in SP 237 cfm Airflow @ 2.000 in SP 216 cfm Airflow @ 3.000 in SP 165 cfm Airflow @ 4.000 in SP 70 cfm