These 400 grit sandpaper sheets measure 9x11 inches and come in a pack of 100, featuring durable silicon carbide abrasive for reliable, fine finishing. Designed for both wet and dry use, their latex waterproof backing and resin bond ensure long-lasting performance. Ideal for detailed work in woodworking, automotive refinishing, metal polishing, and smoothing plastics or ceramics, these sheets provide consistent, smooth results. Their size and quality make them a versatile choice for professionals and hobbyists aiming for precise surface refinement.