IN-LINE DUCT BLOWER, WHEEL TYPE BACKWARD-INCLINED, DRIVE TYPE BELT DRIVE, INCLUDES DRIVE PACKAGE YES, ASSEMBLY UNASSEMBLED, WHEEL DIAMETER 11 1/2 IN, AIRFLOW @ 0.000 IN SP 2,103 CFM, AIRFLOW @ 0.125 IN SP 2,066 CFM, AIRFLOW @ 0.250 IN SP 2,029 CFM, AIRFLOW @ 0.375 IN SP 1,993 CFM, AIRFLOW @ 0.500 IN SP 1,956 CFM, AIRFLOW @ 0.750 IN SP 1,882 CFM, AIRFLOW @ 1.000 IN SP 1,810 CFM, AIRFLOW @ 1.250 IN SP 1,734 CFM, AIRFLOW @ 1.500 IN SP 1,626 CFM, AIR