Hampdon Industrial Stocks the Premium OMEGA Tungstens.  

Features:

Pack of 10
100% Tungsten
1.6mm x 175mm length
Trade Quality (Not recycled)
Annealed for superior grain structure
Manufactured to ANSI/AWS A5.12 -98 and ISO 6848
Correctly ground
Offers excellent arc starts for AC Welding
Tungsten of choice for aluminium or magnesium welding
Tax invoice supplied

Pure tungsten Information

These electrodes form a clean, balled tip when heated and provide great arc stability for AC welding with a balanced wave. Pure tungsten also provides good arc stability for AC sine wave welding, especially on aluminum and magnesium. It is not typically used for DC welding because it does not provide the strong arc starts associated with thoriated or ceriated electrodes.