Ideal for wet or dry sanding, this silicon carbide abrasive paper is suitable for metals, glass, ceramics and stone. Extremely flexible with a waterproof backing, each sheet measures 9" x 11". This 20 piece assortment contains two each of the following grits: 180, 240, 320, 400, 600, 800, 1200, 2000, 2500, 3000.