Diamond Polishing Pads 4 inch Wet/Dry 75 Pieces Set Pad 3mm Thick Granite Concrete 75 Pcs of 4" Diamond Polishing Pad (3mm Thick) for concrete stone. 75 Pads are: 10 X Grit 50 100 200 400 800 1500 3000. 5 Pcs X Buff.