... special technique, thus ensuring the even quality of material being grinded.2. Tough bead bears impact better, and minimum friction ... CompositionZrO2>65%SiO2>30%Special Density>3.9g/cm3Bulk Density>2.4g/cm3Size0.6-20mm2. Rigidity HRA 87, 9 ( ... ,1.0-1.2,1.2-1.4,1.4-1.7, 1.5-2.0,2.0-2.5,3,4, ... 10 or to be customized Application: 1) Paint , Coating 2) Ultra-fine grinding for Cosmetic , Magnetic band 3) ...