... .Ture density:3.9 4.Hardness(mohs):9.15 5 Color:blackBlack silicon carbibdeSIC 98%.......F.C 0.35%....Fe2o3 ... .Abrasives gradeGrit size: 16#,20#,24#30#,36#,46#,54#,60#,80#,100#,120#,150#,180#,220#Micropowder:240#,280#,320 ... #,360#,400#,500#,600#,800#,1000#,1200#,1500# 2000#,2500#,3000#,4000 ...