Masterweld 07WP093 3/32 x 7" Pure - Green Tungsten Electrodes (10 Pack)[GREEN PURE TUNGSTEN] The original pure tungsten electrode contains at least 99. 5% tungsten and delivers all of the properties classically associated with tungsten superior conductivity, durability, and performance. It suits AC welding of heavy load conditions only. [AWS CERTIFIED] AMERICAN Welding Society standard AWS A5. 12M A5. 12: 2009 conformance. [PERFECT DESIGN] By checking the color of the outer packaging, you can quickly and easily