Blower with Drive Package Wheel Type Forward-Curved Drive Type Belt Drive Includes Drive Package Yes Assembly Unassembled Wheel Diameter 10 1/2 in Airflow @ 0.250 in SP 1 540 cfm Airflow @ 0.375 in SP 1 435 cfm Airflow @ 0.500 in SP 1 330 cfm Airflow @ 0.750 in SP 1 075 cfm Airflow @ 1.000 in SP Not Applicable Airflow @ 1.250 in SP Not Applicable Airflow @ 1.500 in SP Not Applicable Airflow @ 2.000 in SP Not Applicable Airflow @ 2.500 in SP Not Applicable