... WZr8,WL10, WL15, WL20,Wc20,WY20 2.Dia 1.0-12.0mm 3.Length 50,75,150,175mm ... contamination and offers the welder easier arc starting capabilities and a more stable arc.1) 2% thoriated tungsten contains a ... same time offers the welder easier arc starting capabilities and a more stable arc. Generally used for DC electrode ... Wt20 (red)3) other impurity: _0.20%4) diameter: 1.0 - 12.0mm5) length: 50.00, 75.00, ...