(a) 8 Pieces of 7 / 180mm Diameter Diamond wet dry (wet use recommended) Polishing Pad for granite marble concrete sandstone travertine polish. 1 X Grit 30 50 100 200 400 800 1500 3000. (b) 1 Piece of 7 Diamond Glaze Buffer (it brings natural granite marble mirror like polished result). (c) 1 Piece of 7″ PVC BACKING PAD (5/8″-11 Female Thread arbor). Pad Holder’s max capacity / velocity is 5000 RPM. PLEASE DO NOT USE IT WITH HIGH SPEED GRINDER OR POLISHER. 3.2mm thickness. Recommend 2500 – 5000 rpm. Wet or dry use (wet use recommended).