The 420234 nozzle is compatible with XPR 170 and 300 torches.  This nozzle works with 50 amps on mild steel using straight oxygen or compressed air.  Sold individually. 

Benefits of Genuine Hypertherm Consumables:
Made in the USA
Maximum consumable life for high capacity automated systems
Chambered Swirl Ring
Conical Flow
CoolFlow
LongLife
TrueFlow
Vented Shield HyLife
Tool free lead connection
Tool free nozzle
Inline valve process