3M SandBlaster 20908-150 Sanding Sponge, 3-3/4 in L, 2-5/8 in W, 150 Grit, Medium, Aluminum Oxide Abrasive

These sanding sponges allow easy surface preparation for bare wood, metal or drywall. Made of an electrostatically coated ceramic aluminum oxide mineral blend for increased durability and worklife.