Check the listing for details. 8" inch Diamond coated Flat Lap Disk Grit 180 Grinding Disc Lapidary Tools. Condition: New. Listed at 21.80 USD. 8 inch 200 mm Diamond coated Flat Lap Disk Grinding wheel Grit 180 Coarse Product Specification: Outside diameter : 8" inch (200mm) Arbor hole :1/2" (12.7mm) Thickness : about 1.2mm Grit : 180 Coarse Diamond coating Density : Perfectly high Diamond coating surface area : almost 95% Wet use recommended, The grinding disc itself is not magnetic. Suitable to grind and polish jewelry, glass, rock, 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, 150, 240, 320, 400, 500, 600, 800,1000, 1200, 1500, 1800, 2000, 3000. We will send out your order within 1-2 days after payment has been received and cleared. Welcome Visit My eBay Store: jinglingtools