Inline Centrifugal Duct Fan Housing Material Steel Fits Duct Dia 14 In. Voltage 120V Max Amps 4.76 Max Wattage 495 Number of Speeds 1 Housing Dia 17-7/8 In. Length 17-1/4 In. Motor RPM 1700 CFM @ Duct 2156 CFM @ 0.000-In. SP 2156 CFM @ 0.125-In. SP 2061 CFM @ 0.250-In. SP 1965 CFM @ 0.375-In. SP 1868 CFM @ 0.500-In. SP 1764 CFM @ 0.750-In. SP 1520 CFM @ 1.000-In. SP 1193 Max Inlet Temp 140 Degrees F Inlet and Outlet Dia 14 In. Includes Mounting Brackets