【PREMIUM MATERIAL】Made of Ceramic abrasive,Ceramic material is the abrasive with the highest hardness, which is harder than zirconium corundum and alumina abrasive. It has high hardness, high wear resistance, and excellent grinding performance. It is especially suitable for the grinding of difficult-to-grind metals, aluminum alloys, etc. 【EASY TO IDENTIFY】The grits of the sandpaper are printed on the back for easy identification. Package contents: 10 sheets of 3000 grit extra coarse sanding sheets.Ideal to use with Sanding Blocks,also suitable for hand using. Assorted Grit Sandpaper 60 to 2500, High Performance White Fused Alumina Abrasive Wet/Dry Sanding Sheets for Wood Furniture Finishing, Metal Grinding, Automotive Polishing, 9 x 11 Inch Sand Paper