An aluminium liner guides your wire inside the torch lead, and this liner ensures the wire makes it out of the torch tip. The size of your liner needs to match the size of the wire you are using. For aluminium liners, a neck spring is also required (SKU: NKSTL). The liners are colour coded for easy identification:

• 0.6-0.8mm (Blue)
• 0.9-1.2mm (Red)
• 1.2-1.6mm (Yellow)