In-Line Duct Fan For Fan Type Centrifugal Duct Fan Airflow @ 0.000 in SP 170 cfm Duct Diameter 4 in Motor Output Power 72 W Motor IP Rating IP44 Nameplate Voltage 120V AC Phase 1 Number of Speeds 1 Overall Diameter 9 3/4 in Overall Height 11 3/4 in Overall Width 8 in Application General Purpose High-Efficiency Motor No Housing Material Galvanized Steel Motor Speed 2 750 RPM Includes Mounting Bracket Maximum Inlet Air Temperature 140 Degrees F Speed Control Included No