1)Inlet Port: 1/4SAE 2)Certificate:ISO 9001/CCC/CE, ISO9001:2008 3)Trade Report Audited by BV,download free! Double Stage Vacuum PumpFeatures:1) The front and back stage connected by one same shaft,higher vacuum degree2) PM material for back stage pump,higher wear resistance3) Superiority design on oil entering system,oil and gas separated thoroughly,no oil mist TYPEAC.140.058Voltage (V/Hz)220V/ ...