3. A water refillable polishing machine with a 4500 R.P.M polishing featuring a blade free design for polishing 1. 3-inch pneumatic polishing machine, fast polishing, strong and 2. Time saving and labor-saving, suitable for polishing and grinding marble, artificial stone, , jade and other stone materials 4. Concentric circle design, polished at a high speed of 4500 rpm to achieve more uniform polishing, improve efficiency, and reduce working time, Weight: 3.77762085937 pounds, Manufacturer: Ehwisbe