Features: 1) Used on manual polishing machines 2) Sizes: 6", 8", 10" 3) Grit specifications: 400#, ... 500#, 800#, 1500#, 3000#. Resin bonded diamond polishing discFeature1.good sharpness and definition2.strong grinding ability3.low cost ... machine, semi-automatic and automatic machine.3.used with water. Polishing Pads