Victor Welding Nozzles have individual Spiral Mixers which provide optimum flame characteristics, a Brass Coupling Nut with a built-in snap ring that protects the cone-end. All Victor Nozzle assemblies are 100% flame tested to insure performance, and has a double o-ring that provides a gas-tight connection, without a wrench. DFE Dual Flexible Elbows, this nozzle assembly is for special welding, brazing and heating, and uses replaceable tip ends