The Mercer Industries 9x11 Silicon Carbide Waterproof Paper Sheets are made with silicon carbide grain which ensures fast and sharp cutting. A resin on resin bond with an open electrostatic coating resists loading. Best results are obtained when used with water or lubricant. Only high quality latex-backed paper is used. Mercer Industries is a 3rd generation family owned company that was built on core values of Quality, Performance, Delivery, Service, and Price. Founded in 1968, Mercer Industries offers more than 3,000 products for the flooring, industrial, automotive and welding markets. Mercer, formerly known as Mercer Abrasives, is committed to serving its customers and providing quality products. For more information, visit mercer industries dot com. We're here to support you. Please contact our team at info at mercer industries dot com with questions or comments. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.