Check the listing for details. 4" in Grit 80-3000 Diamond Grinding Discs Flat Lap Disk Lapidary Tools for Stone. Color: Silver, Condition: New. Listed at 10.99 USD. 4" inch Diamond Grinding Disc Wheel Coated Flat Lap Disk Grit 80-3000Outside diameter : 4" inch (100mm)Arbor hole : 5/8" (16mm)Arbor hole of diamond grinding disc is 5/8" (16mm). If you need the grinding disc with arbor hole 20mm, 22.23mm, 25.4mm, we can change the arbor hole by wire electrode cutting. Please leave a message such as “change arbor hole to 22.23mm", when you submit your order.Thickness : 1-1.1 mmGrit : 80 120 150 180 240 320 400 500 600 800 1000 1200 1500 2000 3000Quantity: only 1 Piece, please choose the grit from the multiple-choice menu Grit type: Coarse/ Medium/ Fine/ Very FineDiamond coating Density : Perfectly highDiamond coating surface area : almost 95%, only one side is coated diamondWet use recommendedSuitable 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. Use the fine grit diamond lap pad to smooth and shape pieces and create polished flat surfaces When used as part of a multi-stage grinding and polishing process it's easy to create smooth finished edges with a professional look. 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 5/8" arbor hole, can be used in the Angle of grinding machine. 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 10-30 business days delivery to your home We will send out your order within 1-2 days after payment has been received and cleared.Please let us know if you are looking for other accessories or hardware.