... ,high toughness,high wearproof,high density, grinding efficiency, no impurity,etc. Features:1. wearing a very low (ppm) the amount of ... products: magnetic materials, piezoelectric ceramics, dielectric ceramics 3. to prevent pollution: medicine, food, cosmetics 4. Ceramics: Electronic ceramics, refractory ceramics, structural ceramics, etc.Size: Diameter(mm)3 ...