B.W.P Red Tips WT20 2% Thoriated Tungsten Assorted Electrode Ground Finish Kit For TIG Welding 0.040 1/16 3/32 1/8 WT20 2% Thoriated Tungsten Electrodes For TIG Welding. Ground finish quality. Applicability: AC welding: thin-gauge aluminum and material less than 0.060" DC welding: Carbon steel, stainless steel, nickel, and titanium. You will get 10pcs WT20 Tungsten: 2pcs 0.040"*6" (1.0*150mm); 3pcs 1/16"*6" (1.6*150mm); 3pcs 3/32*6" (2.4*150mm); 2pcs 1/8*6" (3.2*150mm)