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Material:Sponge Size:5 inch (125mm) Diameter,5mm thickness Grits:300-400/ 500-600/ 800-1000/ 1200-1500/ 1800-2000/ 3000 The Grit is larger, the sand is finer Application: This sponge sandpaper is used for industrial production, polishing the phone shell, computer shell and other rough products.Please note it does not support personal polished phone and computer shell. It has a good grinding effect on shells of ABS, PC, PC + GF, aluminum Alloys and other materials, specially suitable for fine grinding. Sanding process: remove burrs, repair scratches on the surface, fine grinding. Package included: 5pcs sanding sponge