... thus ensuring the even quality of material being grinded.2. Tough bead bears impact better, and minimum friction allows ... HRA 87, 9 (Mohs) min3. Slenderness ratio 8.0Mpa.m1/24. Crushing strength 150kgf (2mm )5. wearing value international ... ,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) ...