Sizes: 1.0, 1.6, 2.4 & 3.2, 4.0, 4.8, 6.4mm. Zirconiated Tungstens are used for AC Tig welding. Excellent for welding Aluminium. They resists contamination & ball up well creating a more stable arc than pure tungsten electrodes.
Do your Argon bottles have a valve that restricts getting the last of the gas out? This fitting will open that valve so you can use all the gas you paid for! - Also used with high pressure decanting hose's for filling small bottles from large workshop bottles.