Description:1. 4000 mesh fit for crystal, glass, car scratch glass polishing.2. The use of rare earth cerium oxide polishing powder, high efficiency.3. Rare earth polishing process has physical cutting, but also a combination of polishing effect.4. If the depth of scratches must be polished with sandpaper polished.5. Polished glass Optical glass is best to use the ball of wool, more delicate. Specification: Material Cerium Oxide Powder Type 4000 Mesh Color White Particle Diameter 3.75 Micron Net weight 100g/ 3.5oz Box size 7x 8cm Instrument:1. Mixed with water & polishing powder, & then with a sponge or wool wheel stained with polished powder in the scratch at the polished.2. If it is manual can also be used with a cloth stained with powder polishing, for the deep scratches can be polished with glass, such as the first with 400 1000 1500 2000 3000 sandpaper grinding, at this time the glass has a hair, & then repeatedly wipe with polishing powder, & can not have impurities. Package Included:1 X 100g Cerium Oxide Powder