Air Compressor Pump, Lubrication Type Splash Lubricated, Number of Stages 1, Maximum Output Power 10 hp, Free Air Flow Rate @ Maximum Pressure 27.2/33.9 cfm @ 120 psi, Number of Cylinders 4, Maximum Operating Pressure 120 psi, Flywheel Diameter 19 7/8 in, Flywheel Included Yes, Pump Speed 740 RPM, Construction Cast Iron, Groove Section B, Number of Grooves 2, Valve Type Disc, Valve Material Swedish Steel, Rotation CCW, Stroke Length 3 in