Air Compressor Pump Lubrication Type Splash Lubricated Number of Stages 1 Maximum Output Power 1 hp Free Air Flow Rate @ Maximum Pressure 4.2 cfm @ 100 psi Number of Cylinders 1 Maximum Operating Pressure 145 psi Flywheel Diameter 9 1/2 in Flywheel Included Yes Pump Speed 1 120 RPM Compressor Type Piston