3M 02602 3M™ Softback Sanding Sponge, 02602, Superfine-500/600, 4 1/2 in x 5 1/2 in (11.43 cm x 13.97 cm), Colour: Gray, 3M Stock No. 7000000588

Coated with aluminum oxide, 3M™ Softback Sanding Sponges can be used wet or dry when sanding on wood, fiberglass/gel coat, marine paints, metals and plastics. They are flexible and conformable to allow for hand sanding in areas inaccessible to machine sanders. Superfine ranges from grade 500 to 600 grit.