In-Line Duct Fan, For Fan Type Tubeaxial, Airflow @ 0.000 in SP 147 cfm, Duct Diameter 4 in, Motor Output Power 37.3 W, Motor IP Rating IP54, Nameplate Voltage 120V AC, Phase 1, Number of Speeds 1, Overall Width 8 in, Application General Purpose, High-Efficiency Motor No, Housing Material Steel, Motor Speed 2,580 RPM, Includes Mounting Bracket, Maximum Inlet Air Temperature 104 Degrees F, Speed Control Included Yes, Speed Controllable Yes, Bearing Type Ball Bearing