Check the listing for details. 150mm Electroplated Diamond Discs Abrasive Wheel 500 Grit Stone Tools. Condition: Brand New. Listed at 16.41 USD. 6 inch Quality Electroplated Diamond Coated Flat Lap Disk Grinding Wheel Grit 500 Fine Outside diameter : 6" inch (150mm) Arbor hole : 1/2" (12.7 mm) Thickness : 1.2 mm Grit : 500 Fine Diamond coating Density : Perfectly high Diamond coating surface area : almost 95%,only one side is coated diamond. Wet use recommended Suitable to grinding gemstone, jewelry, glass, rock, carving knife, etc… These diamond discs are one of the finest discs manufactured for Hobby, Lapidary, Glass applications The diameter flat lap wheels have a high density quality diamond coating. They are absolutely flat and parallel to meet the most exacting faceting requirements. Quick Tips 1. Recommended for rough and fine grinding on faceting material plus general lapidary grinding when precision is required. 2. All our flat laps wheels have a 1/2" arbor hole and are intended to be mechanically clamped to a Master Lap. 3. The laps are made with 1mm thick steel plate that has been machined true and flat. The lap is stiff enough to be used as is, but we recommend With The Use Of Aluminum master lap. Also Available in Grits 60, 80, 100, 120, 150, 180, 240, 320, 400, 500, 600, 800,1000, 1200, 1500, 1800, 2000, 3000. Regular Air postage from China to Worldwide and takes 10-35 days delivery to your home We will send out your order within 1-2 days after payment has been received and cleared.