Check the listing for details. 45pcs Sandpaper 400 Grit Waterproof Backing Abrasive Wet Dry Sanding Sheets. Condition: New. Listed at 22.32 USD. Made from silicon carbide, which ensures sharpness and resists clogging, load and abrasion, providing the ability to cut quickly and smoothly. The back is made of kraft paper, which is soft, wear-resistant and not easily soluble in water.The surface particles of the sanding paper are tightly packed and evenly distributed to ensure efficient and even grinding, helping eliminate bumps or uneven surfaces and making it less likely to scratch the contact surface.This sand paper can provide a more effective wet polishing effect, so that the grinding debris is not easily accumulated on the sandpaper, reducing clogging and improving grinding efficiency.Can be used to sand and polish wood, metal, plastic, stone, etc. Widely used in wooden furniture manufacturing, metal processing, metal sanding, handicraft production, car polishing, etc.