1.Double stage vacuum pump 2.New refrigerant,especially for R410A,R407C ... gaugeSeal made from special materialNew refrigerant series vacuum pump especially for R410A,R407C,etcMeet all different voltages ... oil- returning,suitable for R410A new refrigerant Integrated pump body structure,150 micron of ultimate vacuumBig sight glass ... :according to the motor 220V only. Single Stage Vacuum Pump(V-i120SV)