Almadine Garnet 20/40 mesh , use for : sand blasing , abrasive hight purity, 1. The garnet ... 4)Coated abrasive 5. The usual size are 10-20mesh, 20-30mesh, 20-40mesh, 30- 60mesh, 60grit, 80grit, 120grit, 0.25-3 ... adjusted as your require. 6. Chemical property: SiO2: 35.0-40.0% Al2O3: 16.0-22.0% FeO: 22.0-27 ...