9" x 13-3/4" Aluminum Oxide Open Coat Sanding Belts Open coat is made with aluminum oxide grain, is full resin bond, has an "X" weight backing and is open coat. This material is used for composite materials and wood. The open coat prevents loading.
9" x 13-3/4" Aluminum Oxide J Weight Sanding Belts Made with aluminum oxide grain, is full resin bond and has a “J” weight backing. Used for brass/bronze, aluminum, steel, titanium, mica nickel, alloys and hardwoods.