Features: Made of high-quality sandpaper materials, practical and durable. Grit 180 to 10000, the smaller the mesh number, the rougher, and the faster the grinding efficiency; the bigger the mesh number, the finers, and the slower the grinding efficiency. Used for polishing various surfaces such as stone, jade, agate, glass, mold, electronics, glass, equipment, jewelry, metal and non-metal. This product can be dry and wet ground. Better to use wet grinding! The powder that dropped during this polishing will not block the sandpaper and make the product more durable. Suitable for pneumatic, electric rotary grinders and electric grinders. Geat for abrasive tools and metal surfaces polishing. Specifications: Material: Sandpaper Grit: 10000/7000/5000/3000/2500/2000/1500/1000/800/600/400/320/240/180 Length: Approx.5.8cm/2.28inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 14x Sand Paper Bar