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These 7-7/8" x 29-1/2" Silicon Carbide belts are suitable for grinding and sanding on wood flooring, glass, plastics, stone, ceramic and non-ferrous metals like brass and bronze. Silicon carbide is one of the sharpest and hardest abrasives and is coated on a heavy full polyester cloth backing to provide for a waterproof, tear-resistant sanding belt. Choose from 5 or 10 belts per pack.