Refined cartridge 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. 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. T-Fitting 1/4″ FL-M x 1/2 ACME-M. 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. Stages: 1. Free air displacement: 3 CFM. Ultimate vacuum: 80 microns. Motor: 1/4 HP. Pump speed: 1720 RPM. Electrical specs: 110/120 V, 60 Hz. Power: 110 V cable. Weight: 14 lbs (6.35 kg). Dimensions: 30 x 15 x 26.5 cm