Robinair (15501) VacuMaster Economy Vacuum Pump - 2-Stage, 118 liters/minute Robinair's VacuMaster Economy Vacuum Pump is designed for air conditioning and refrigeration service; featuring a 2-stage rotary vane design, 7.5 ounce oil capacity, and non-skid feet 118 liters/minute (5 CFM) free air displacement; factory rated to 35 microns 1/3 HP, 220V/50 Hz thermally protected motor for international use Features an inlet fitting engineered for maximum airflow, while preventing oil backflow, and finned aluminum surfaces that dissipate heat faster, keeping the pump cooler and extending life 1/4 inch MFL & 1/2 inch ACME inlet fittings, 3/8 inch FFL x 1/2 inch Acme adapter, easy to read sight glass, easy access oil fill port, and angled oil drain valve for faster, more complete draining