The 420291 shield is compatible with XPR 170 and 300 torches.  This shield works with 40 amps on non-ferrous material using straight nitrogen 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