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