... diamond grinding disc 1.Diameter:3"(12mm thick) 2.Grit:50#,100#,150#,300#,500#,800#,1000#,1500#,2000#,3000# MRK-A diamond ... grinding disc NO.PictureDescriptionDiameter(inch)Thickness(mm)Grit size available1MRK-A renovation ... " Renovation disc4"126Wet polishing disc3"2.54"37Dry polishing disc(apply to granite)3"102000#,6000#,10000#4"108Dry polishing ...