VEVOR Rotary Vane Vacuum Pump 12CFM 1HP Single Stage HVAC Auto AC Refrigerant Air Vacuum Pump Wine Degassing Milking Medical Food Processing Air Conditioning Vacuum Pump (1-Stage, 12CFM) Single Stage Rotary Vane Vacuum Pump - Free air Displacement: 12 CFM; Ultimate Vacuum: 5 Pa; Power: 1 HP; Inlet Port: 1/4" & 3/8"SAE; Voltage: 110V / 60Hz; Casing Material: Alloy aluminum The Vacuum Pump is applicable to vacuum packaging, vacuum freezing, automobile reparation, gas analysis, medicine mechanism, printing mechanism and other vacuum evacuations Robust die alloy aluminum housing and cooling fan make the pump cool and run efficiently for a longer time The air passage is specially designed to prevent oil from flowing back to contaminate chamber after pump stopped Use clean filtered oil to all internal bearings to help reduce heat & maintenance