Hypertherm Nozzle is compatible with the Powermax 65,85,105 & 125 Plasma cutting systems.
The 420151 Nozzle HyAmp is FineCut tip.
The Nozzle is a copper material and is used in plasma cutting to constrict the gas stream with the arc flowing through it.
That arc jumps from an electrode in the torch to something else – usually the conductive material being cut.