Tungsten CK White 2.4mm

My personal choice for aluminum alloys. Price is for 1 tungsten.

Non-Radioactive. Best for use in Alternating Current (A/C) for aluminum alloys and magnesium alloys using inverter or transformer based constant current power sources. Balls well, handles higher amperage than pure tungsten with less pitting, better arc starts and arc stability than pure tungsten.

0.8% ZIRCONIATED (WHITE) EWZr-8/WZ8
Principal Oxide: 0.7–0.9% Zirconium Oxide