MRK-A diamond grinding disc 1.Diameter:3"(12mm thick) 2.Grit:50#, ... #,150#,300#,500#,800#,1000#,1500#,2000#,3000# MRK-A diamond grinding disc NO.PictureDescriptionDiameter(inch)Thickness(mm)Grit size available1MRK ... grains with resinoid.2)Supply a better performance in grinding stone with polishing effect to get high gloss in a short ...