Mastercool 90066-2V-110-Bl Black Series 6 Cfm Vacuum Pump 2 Stage High volume fan provides cool air to the motor and pump Vapor discharge/oil fill port, easily removable, contains internal check valve to prevent escape of liquid oilInternal check valve to prevent oil back flowCooling fins to keep temperature cooler during extended motor operationThermally protected motor with on/off rocker switchLarge, lightweight reinforced base for stable positioningEasily accessible oil drain valveLarge oil level sight glass with max/min oil level indicatorSPECIFICATIONS: No. of Stages: 2 , Motor: 1/3 HP Pump Speed: 1720 RPM