Piston Air Compressor Lubrication Type Oilless Number of Cylinders 2 Output Power 0.5 hp Phase Single Voltage 115/230V Maximum Continuous Pressure 50 psi Maximum Intermittent Pressure 50 psi Maximum Vacuum Not Applicable Free Air Flow Rate 4.5 cfm Maximum Speed 1 725 RPM Inlet Size 1/4 in Inlet Type NPT Inlet Gender Female Outlet Size 1/4 in Outlet Type NPT Outlet Gender Female