Additional Details ------------------------------ Product description: Introducing the Oatey 41598 Sandpaper Sheets, a high-quality abrasive sheet that meets ASTM Spec. D4551. Measuring 4 x 50 ft. in length, this blue sandpaper sheet is perfect for a variety of surfaces including tile, grout, and backer board. Its durable construction ensures long-lasting use, while the convenient 6-inch markings make measuring and cutting a breeze. Trusted by professionals for over 100 years, Oatey products are known for their superior quality and reliability. Add this sandpaper sheet to your toolkit today.