... , Double row, Turbo, Swirl 3. Grit No.: Course Medium, Fine Diamond Cup Wheels, Grinding Wheel are designed for grinding and polishing marble ... :1. Diameter: 100mm-250mm.2. Application: Diamond double row grinding cup wheels are ideal for form mark removal, deburring, chamfering, smoothing ... .: Outer Diameter From 105mm to 250mm6. Grit No.: Course, Medium, Fine Contact: Mr. Adrian Zhan