Image shown is actual grain. These are industrial grade 4" x 132" CF sanding belts. Coolflex is a PREMIUM aluminum oxide semi flexible "J" weight poly cotton coated abrasive material, with grinding aids added to the resin and top coat, with a closed coat. This provides outstanding performance and consistent finishes for many stainless steel sanding and other metal sanding applications. Keystone Abrasives warranties all of our sanding belts for manufacturer’s defects and your satisfaction is completely guaranteed!