Orion Tungsten electrodes will last for a very long time over many, many welds. But they will eventually need to be replaced. Be sure to replace them with genuine Orion Tungsten electrodes, available in 3 different sizes:

• 0.5 mm diameter Tungsten Electrodes that are 56 mm (2.2 in) in length. Pack of 15 electrodes
• 1.0 mm diameter Tungsten Electrodes that are 56 mm (2.2 in) in length. Pack of 3 electrodes
• 1.0 mm diameter Tungsten Electrodes that are 56 mm (2.2 in) in length. Pack of 15 electrodes
• 1.5 mm diameter Tungsten Electrodes that are 56 mm (2.2 in) in length. Pack of 15.
  

Or purchase a combinations pack with 10 - 1.0mm Tungsten electrodes that are 2.2 inches in length and 10 - 0.5mm Tungsten electrodes that are 2.2 inches in length (contains a total of 20 electrodes).