... : HNCC Ceramic Ball, HNCC Zirconia Ball, Best grinding Medium, HNCC Zirconia Ceramic Ball2.Material Superfine Zirconium Dioxide3.Certificate ISO9001,ISO140014.Density: ≥5 ... , structural ceramics, etc. 7. Size: Φ3mm,Φ5mm,Φ6mm,Φ8mm,Φ10mm,Φ12mm,Φ15mm,Φ20mm etc.Process arrangement by following YOUR requirement .8 ...