Your Orion welder comes with 5 tungsten electrodes (1.0mm size) which will last for a long time handling many welds. Eventually, they will need to be replaced.  This is a package of 15 of 0.5 mm diameter Tungsten Electrodes (66mm (2.6") in length. 

Also available:

• A convenient mixed pack containing a total of 20 electrodes, ten of the 0.5mm and ten of the 1mm sizes (see our 8300131). 

• 1mm diameter Tungsten Electrodes that are 66 mm (2.6 in) in length. Pack of 15 electrodes (see our 8300133).