... Weldable materials: carbon steel, stainless steel, alloy steel, copper and other metals. WS-160, WS-200, WS-250, WS ... size, light weight5. Unique regulatory function of arc force, convenient and practical6.Weldable materials: carbon steel, stainless steel, alloy steel, ... copper and other metals. ModelWS-160WS-200WS-250WS-315WS-400Power VoltageAC ...