... density 3.wear-resistant Zirconium oxide balls , zirconium oxide ceramic balls,12mm balls Jiaozuo Lifeng Industrial Co., Ltd. ... 1905, specializing in producing zirconia products, ceramic grinding balls, zirconia ceramic dental block, ceramic knives. Our products ... pollution: medicine, food, cosmetics 4. Ceramics: Electronic ceramics, refractory ceramics, structural ceramics, etc.Size: Diameter(mm)3,3 ...