... 1000#,1500#,2000#,3000# 1A-MRK renovation discNO.PictureDescriptionDiameter(inch)Thickness(mm)Grit size available1MRK-A renovation disc3"1250#,150#,300#,500#,800 ... #,1000#,1500#,2000#,3000#2MRK-B renovation disc3"850#,150#, ... to marble except for white marble)3"221A-MRK renovation disc is for curved surface and the small plane grinding ...