Chemical Composition Al2O3≥90% CaO+MgO+Fe2O3+others 2% Bulk Density 3.60g/cm3 Water Absorption<0.01% Hardness(Mohs) ≥9 Color White Size Dia(mm) 20 more or less 1.5 18 more or less 1.5 15 more or less 1 13 more or less 1 10 more or less 1 8 more or less 0.5 6 more or less 0.5 3 more or less 0.5 1 more or less 0.2 (mm)Dimension≥15 Wear Rate≤0.08 (mm)Dimension≥13 Wear Rate≤0.1 (mm)Dimension≥10 Wear Rate≤0.12 (mm)Dimension≥8 Wear Rate≤0.18 (mm)Dimension≥6 Wear Rate≤0.2 Character of Microcrystal Wear Alumina Ball(CIP): Using foreign imports, the original grain size less than 1 micron alumina, calcined with high-temperature tunnel kiln, the grain size controlled growth to more wear coefficient at the end. Coupled with advanced roller-made technology and equipment, not only ensured the whole round appearance, size specifications rich, but also guarantied the stability and reliability of the product quality. Notes: We can pack the products according to your requirement, also we can do OEM or ODM. The main application areas: Chemical inks cosmetics.