Image shown is actual grain. These industrial grade 3-1/2" x 15-1/2" A/O Medium non-woven sanding belts are manufactured by Keystone Abrasives. The AO MED non-woven sanding belts are made from non-woven compressible nylon fibers impregnated with ALUMINUM OXIDE. Available in three grades: Coarse (brown), Medium (maroon) and Very Fine (blue). Keystone Abrasives warranties all of our sanding belts for manufacturer’s defects and your satisfaction is completely guaranteed!