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Brown Corundum Powder, Aluminium Oxide, Brown Fused Alumina for Sale Brown Corundum Refractory. High Hardness & Toughness: Moh's Hardness 9, suitable for grinding high-tensile strength metals. Wide Grit Range: Available in sizes 16-240# for various blasting and polishing needs. High Purity Al2O3: Contains 95.0-97.5% Al2O3 for superior abrasive performance. Customizable Packaging: Packing can be customized to meet specific customer requirements. Free Sample Available: 0.5-1kg free samples provided, freight collected by buyer. Versatile Application: Used for sand blasting, polishing, resin bonded tools, and refractories.