3M Sanding Sponge 909NA-3P-CC, 3 3/4-Inch x 2 5/8-Inch x 1-Inch (9,52 cm x 6,66 cm x 2,54 cm) Medium/Coarse, 3pk, Open Stock. 3M Small Area Sanding Sponge is for either dry or wet sanding. Ideal for sanding wood, paint, metal, plastic and drywall. Two sanding grades on one sponge-Inch a combination of extra fine/fine, fine/medium, or medium/coarse. Rinse and reuse.