... ,magnesslum ,jewel,optical glass,ceramics,etc.Super micropower of it is also a kind of ceramics material.Abrasives gradeGrit size: 16#,20 ... -0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320meshPurposeSpecificationChemical Composition(%)Magnetic material content(%)maxAbrasives gradeSICminF.CmaxFe2O3maxgrain12-80990.200.20.018090 ...