... machine. Available on welding carbon steel, alloy steel, stainless steel, copper, silver, titanium, ect.With functions: Gas feed in advance, Delay ... -8.0DC TIG5-315TIG-315P0.3-12DC TIG5-400TIG-400PPure copper (Red copper)0.5-4.0DC TIG5-315TIG-315P0.5-50DC ...