Tungsten carbide ball for pen has advanced tip-equipment and imported production technique Tungsten carbide ball for pen:1. Corrosion prevention2. non-slip3. glass hard,abrasion proof4.low roughness ,not wear-out the ball5. microspore, printing ink’ wet ability well, carry over more printing ink, lineation clearing6. good handle ,taking bake superabundant printing ink Tungsten carbide pen ball