Robinair (15601 CoolTech Vacuum Pump - 2-Stage, 142 liters/minute Free air displacement: 142 liters/minute Factory micron rating: 20 microns Intake fitting: 1/4 inch MFL and 1/2 inch MFL Oil capacity: 15 ounces (445 ml) Voltage: 115V/220-250V, 50/60 Hz