You can use Flux Core Wire(Gasless) or Solid Wire(Gas) on this MIG Welder. This MIG Welder fits 1KG/2lbs, 5KG/10lbs 0.8mm1.0mm Flux Core Wire/Solid Wire, MAX Welding Thickness 4.5mm. Please notice that this MIG welder package does not include flux core wire or solid wire.Tig Welding Mode is suitable for 1.0 mm-2.0 mm Tungsten, TIG Welding thickness 0.5MM-3MM, Suitable for thin work-pieces such as stainless steel, alloy steel, carbon steel etc. Arc Welding fits rods E7018, E6013, E6011. This 4 in 1 MIG welder can meet your needs, no matter you are beginners, hobbyists or professionals. Please wait for the result of cancellation. The order will be processed and completed by automatic warehouse system within 5 minutes. Sending direct message to cancel the order is not allowed for every case. We try our best to make sure every customer is completely satisfied. If there's a problem, feel free to message us! - We're happy to help.