3M Imperial Wetordry Sand Paper 800 grit, 5922-18-CC, 3-2/3 in. x 9 in. (9.29 cm x 22.8 cm), open stock. Use 3M imperial Wetordry Sand Paper 800 grit wet or dry for a premiere finish on lacquers, primers, sealers, plastics and paints. For final or between coats sanding. Features: Silicon carbide abrasive, a sharp synthetic mineral that cuts fast and smooth Use with water or cutting oil to reduce clogging and extend abrasive life Offered in 2 weights of waterproof paper to suit your specific sanding needs: flexible "A" weight backing for contour sanding and durable "C" weight backing for improved stock removal and leveling general surfaces For flat areas, for use by hand or with sanding block