Heavy duty construction. Handle exhaust. Fast cycle time. Ultimate vacuum 25 microns. Manifold valve isolates pump from the system when testing for leaks 3 Inlet port sizes: 1/4 in., 3/8 in. SAE and 1/2 in. ACME. Gas ballast valve helps prevent oil contamination. Internal check valve on pump access fitting prevents oil blowout. Easy access oil fill port. 1/3 HP 110 volt motor. Shipping weight: 38 lbs. Oil capacity: 8 oz.