1.Molybdenum rods, 20 years working experience 2.Content 99.95% (min) 3. ... 4.Dia: 2.5-120mm 5.Custom-made Appearance: Rolling rods: Dark brown, the surface is smooth and straight, no defects ... (crackle, heavy skin, hole, trough, etc); Electrode rods: Bright silver gray metallic luster. (process according to user's ...