Hypertherm CopperPlus Electrode 15-105A Package of 5 (220777)Operating ranges: 15 A105 A Designed for Duramax, Duramax Lock and Duramax retrofit torches, CopperPlus electrodes deliver at least two times the life over standard Duramax electrodes when cutting metal 12. 5 mm (1 2") and under. Double the life means you can cut more parts with fewer changeovers increasing uptime and reducing your operating costs.