Sait 58182 4" x 21" 40-Grit Aluminum Oxide - Open Coat Sanding Belt 5pkAO-X (Aluminum Oxide, Open Coat). Semi-friable aluminum oxide grain on a X-weight cotton backing. For general purpose, open coat grinding, polishing and finishing of materials that have the tendency to load. For use on non-ferrous metals, aluminum and wood.
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