The CYCLONE SYSTEM R SERIES (3.5MM) by Diamax are a set of polishing pads designed for use on granite and engineered stone. use WET with an air polisher or angle grinder. Max RPM: 4,000. Thicker 3.5mm pads with our highest selling R series tread pattern. Available in 30, 50, 100, 300, 500, 1000, 2000, 3000 grits. Pads may be used interchangeably with other Diamax wet polishing systems.