PREMIUM five (5) pack of EWG Rare Earth Mix pre-ground tungsten electrode rods for TIG welding HIGHEST RATED and most reviewed pre-ground tungsten electrodes on Amazon UNITED STATES based manufacturing & customer service staff are here to help you Contains 98.34% Tungsten, 1.5% Lanthanum, 0.08% Zirconium, and 0.08% Yttrium AMERICAN Welding Society standard AWS A5.12M/A5.12:2009 conformance Save time and money grinding electrodes! These CNC ground and presharpened electrodes are ready to weld without any messy and time consuming prep work. Use one side, turn it around, and use the other! Engineered to exact specifications, you can count on these long-lasting electrodes to perform during your most difficult welding application, time and time again. With reliable arc-striking and a low burn-off rate, these electrodes maintain the highest quality of arc while adhering to ANSI and AWS standards. Gold 1.5% Lanthanated electrodes are ideal for welding titanium alloys, copper alloys, nickel alloys, and stainless steel. A safety data sheet (SDS) is available upon request.