Tungsten Electrodes | How To Select Size & Type - WELDING ...
1/16 (1.6 mm) Very common. 3/32 (2.4 mm) Very common. 1/8 (3.2 mm) 5/32 (4.0 mm) 3/16 (4.8 mm) When you choose a diameter, the Tungsten electrodes typically come in a 10-pack. You may find that you need several sizes but keep in mind the length is pretty standard while the diameter can vary.