Air Compressor Pump, Lubrication Type Splash Lubricated, Number of Stages 1, Maximum Output Power 0.5 hp, Free Air Flow Rate @ Maximum Pressure 1.54 cfm @ 125 psi, Number of Cylinders 1, Maximum Operating Pressure 125 psi, Flywheel Diameter 12 5/8 in, Flywheel Included Yes, Pump Speed 525 RPM, Construction Cast Iron, Groove Section A, Number of Grooves 1, Valve Type Disc, Valve Material Swedish Steel, Rotation CCW, Stroke Length 2 in