12 CFM 2 STAGE VACUUM PUMP Refined machining process creates an improved surface finish extending the longevity of the pump life. Expanded internal oil path creates less friction and ultimately less heat. Upgraded seals insure maximum vacuum. U.S. designed and tested. Easy grip handle. Gas ballast valve helps prevent oil contamination caused by high moisture. Easily removable vapor discharge/oil fill port. Large oil level sight glass with max/min level indicator. Easily accessible oil drain valve. Thermally protected motor with on/off rocker switch. Manifold valve isolates pump from the system when testing for leaks. Includes 3 inlet ports, 1/4?, 3/8? SAE and 1/2? ACME. High volume fan provides cool air to motor and pump. Check valve prevents oil back-flow. Cooling fins keep temperature cooler during extended operation. Large, light weight reinforced base for stable positioning 90612-2V-110-BL