... also a kind of ceramics material.Abrasives gradeGrit size: 16#,20#,24#30#,36#,46#,54#,60#,80#,100#,120#,150 ... #,400#,500#,600#,800#,1000#,1200#,1500# 2000#,2500#,3000#,4000#Refractorgrade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh ... 320meshPurposeSpecificationChemical Composition(%)Magnetic material content(%)maxAbrasives gradeSICminF.CmaxFe2O3maxgrain12-80990.200.20.018090-15098.50.250.50.0150180-22097.50.250.70 ...