Nozzle used to protect the quality of your welds of your spools and pull guns. Welding Nozzle ONLY,other accessories demos in the picture is not included. With multi-flame heating for head for heat treating, straightening and priming applications. This is a general purpose heating nozzle with multi-flame for head, for heat treating, metal bending, calorics metal expansion, priming, etc. Different nozzles have different sizes.