3.5oz (100g) Cerium Oxide Fine Micron Grade Optical Glass Polishing Powder | Used for the final polishing blemishes, scuffs, light scratches, lime scale and adhesive residue. | Average Particle Size 2.5 micron. Is high grade refined and perfect any type of glass | High suspension in water and quick polishing when used with any felt polishing product, | No sharp edges, fast acting scratch removal. An abrasive for the polishing of flat glass.