• 320A grit
• 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 two 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

3M™ Pro-Pak™ Between Finish Coats (Wetordry™) can be used with water to reduce clogging and extend abrasive life. Use to sand between coats of varnish, paint or other finishes. Ideal for sanding metal for repainting or prior to primer coat.
3M Pro pak™ Wet or Dry 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.