Rocking Piston Air Compressor, Lubrication Type Oil Free, Number of Cylinders 2, Output Power 0.5 hp, Phase Single, Voltage 115/230V AC, Maximum Continuous Pressure 50 psi, Maximum Intermittent Pressure 125 psi, Maximum Vacuum 25 in Hg, Free Air Flow Rate 4.3 cfm, Maximum Speed 1,725 RPM, Inlet Size 1/4 in, Inlet Type NPT, Outlet Size 1/4 in, Outlet Type NPT