Check the listing for details. 4" inch Diamond Grinding Disc Abrasive Flat Lap Disk 400 Grit for Angle Grinder. Color: Silver, Condition: New. Listed at 10.99 USD. JINGLING 4" inch Diamond Coated Flat Lap Disk Grinding Wheel Grit 400 Product Name: 4 inch diamond grinding disc, 100mm grinding wheels, Flat lap grinding disk Outside diameter : 4" inch (100mm) Arbor hole : 5/8" (16mm) Thickness : 1-1.1 mm Grit : 400 Fine Diamond coating Density : Perfectly high Diamond coating surface area : almost 95%, only one side is coated diamond Quantity: 1 Piece 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 5/8" arbor hole for Angle Grinder. Also Available in Grits 60, 80, 100, 120, 150, 180, 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. Please let us know if you are looking for other accessories or hardware.