... for the fields of furniture, vehicle, electric power, construction, conduit.... WS series IGBT invert DC TIG welderItem\ModelWS-315WS-400WS-500WS ... -8020-8020-8020-80Current Up/Down Time(S)0.1-50.1-50.1-50.1-5Cooling ModeFanTIG Arc StartingHF Arc startingAdvanced Air Feeding ... of furniture, vehicle, electric power, construction, conduit & pipeline and etc. WS series IGBT invert DC TIG welder