Black Brown Corundum Brown Fused Alumina Powder for Fireproofing Refractory Brick. High Purity Composition: Al2O3 content up to 95.5% with low iron content (0.12%). Versatile Grain Sizes: Available in F grit 4#-150#, P grit 8#-220#, and micro powder W0.5-W63. Ideal for Non-Ferrous Metals: Low iron content prevents contamination on non-ferrous metal substrates. Efficient Surface Cleaning: Hard and sharp abrasive cleans rapidly, removes scale, rust, and old coatings. Diverse Applications: Suitable for blast cabinets, ceramic grinding wheels, and refractory applications. Customizable Colors: Available in Brown and Black color options. OEM and ODM Services: Customization services available for specific product requirements. Fast Delivery: Peak and off-peak season lead time within 15 workdays.