Features: brand new and high quality Made of high-quality sandpaper materials, practical and durable. Grit 180 to 1000, the smaller the mesh number, the rougher it is, 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. It's better to use wet grinding! The powder that is dropped during this polishing will not block the sandpaper and make the product more durable. Suitable for pneumatic, electric rotary grinders and electric grinders. It is great for abrasive tools and metal surface polishing. Specifications: Material: Sandpaper Length: approx 5.8cm/2.28 inches Package Includes: 35x/Set Sand Paper Bars note: 1.Please allow 1-3cm 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.