1) Zirconiated tungsten is excellent for AC welding due to favorable retention of balled end, high resistance to contamination, and good arc starting. 2) Color mark: WZr3(brown) WZr8 (white)3) Other impurity: ≤0.20% 4) Diameter: 1.0 - 12.0mm 5) Length: 50.00, 75.00, 150.00, 175.00mm6) Quality of surface: Ground finish, polish finish