3M Imperial Wetordry Sandpaper abrasives are specially designed for wet or dry sanding. Use 3M Imperial Wetordry Sandpaper for a premiere finish on lacquers, primers, sealers, plastics and paints. For final or between coats sanding. Features: Silicon carbide abrasive 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 sanding flat areas Sharp synthetic mineral that cuts fast and smooth Size: 3-2/3 in. x 9 in. For use by hand or with sanding block 10 sheets per pack, 2000 grit Total number of packs included: 18