3M 02621 Imperial Wetordry 5-1/2" x 9" 1000C Grit Sheet The highest-quality 3M abrasive for wet sanding Silicon carbide mineral abrasive provides a refined cut without heavy manual pressure Durable C-weight backing holds up with less curling Suitable for wet or dry sanding Standard sheets can be easily cut to size for ease of use Ideal for jobs requiring very light sanding such as fully cured clear coat or dark-colored paint