STADEA Premium Grade Wet 5" Diamond Polishing Pads 8 Pcs Set For GRANITE MARBLE STONE Polish Stone polishing, 1 pieces X Grit (50, 100, 200, 400, 800, 1500, 3000, Black Buff). 2.2 MM high and flexible velcro backed Works great on Granite, Concrete, Marble and stones etc Optimal RPM 2200 Max RPM 4500