Do it 9 x 11" Waterproof 1,500-Grit Mirror Fine Sandpaper, 3-Pack is for achieving a mirror-like finish during wet sanding. Made from high-quality silicon carbide, this sandpaper is i for use between coats of paint, sealers, varnish, and other finishes. The resin coating ensures durability, outlasting ordinary glue bond sandpapers. Each pack contains 3 mirror fine-grade sheets, measuring 9" x 11", making it an essential tool for detailed finishing tasks. Model Number: 372331