TIG Welding Tungsten Electrodes 2% Thoriated 1/8&rdquo; x 7&rdquo; (Red, WT20) 10-Pack PREMIUM ten (10) pack of red EWTh-2 2% thoriated tungsten rods for TIG welding HIGHEST RATED and most reviewed tungsten electrodes on Amazon UNITED STATES based manufacturing & customer service staff are here to help you ELECTRODE SIZE: 1/8" x 7" or 3.2mm x 175mm 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