TIG Welding Tungsten Electrodes Rare Earth Blend 1/16&rdquo; x 7&rdquo; (Purple, EWG) 10-Pack PREMIUM ten (10) pack of purple EWG Rare Earth Blend tungsten rods for TIG welding HIGHEST RATED and most reviewed tungsten electrodes on Amazon. Comparable to e3 tungsten UNITED STATES based manufacturing & customer service staff are here to help you ELECTRODE SIZE: 1/16" x 7" or 1.6mm x 175mm. Contains 98.34% tungsten, 1.5% lanthanum, 0.08% Zirconium, and 0.08% Yttrium FREE materials safety data sheet (MSDS) and certificate of conformance provided below in the product information, adhering to American Welding Society standard A5.12M/A5.12:2009