... No.: Course Medium, Fine Diamond Cup Wheels, Grinding Wheel are designed for grinding and polishing marble, granite, concrete, porcelin ... : 100mm-250mm.2. Application: Diamond double row grinding cup wheels are ideal for form mark removal, ... Fast cutting with minimal dust, used dry or wet grinding.4. Type: Single row, Double row, Turbo ... Fine Contact: Mr. Adrian Zhan Diamond Cup Wheel, Grinding Wheel