1.5% Lanthanated (Gold) Ewla-15 (Principle Oxide: 1.3-1.7% Lanthanum Oxide). Best For Use In Direct Current (D/C) As An Alternative To 2% Lanthanated Using Inverter Or Transformer Based Constant Current Power Sources. Best D/C Arc Starts And Stability, Low Erosion Rate, Wide Amperage Range, No Spitting. Best For Non Corroding Steels, Titaniums Alloys, Nickel Alloys, Copper Alloys.