Centrifugal Inline Duct Fan Housing Material Galvanized Steel Fits Duct Dia 12 In. Voltage 120V Max Amps 0.95 Max Wattage 136 Number of Speeds 1 Housing Dia 16 In. Length 8-15/16 In. Motor RPM 2665 CFM @ Duct 600 CFM @ 0.000-In. SP 633 CFM @ 0.125-In. SP 616 CFM @ 0.200-In. SP 621 CFM @ 0.250-In. SP 594 CFM @ 0.375-In. SP 582 CFM @ 0.400-In. SP 600 CFM @ 0.500-In. SP 560 CFM @ 0.600-In. SP 577 CFM @ 0.750-In. SP 515 CFM @ 0.800-In. SP 542 CFM @ 1.000-In. SP 467