Image shown is actual grain. These are industrial grade 4" x 36" WP sanding belts. High performance aluminum oxide material, with a heavy poly cotton "X" weight backing, with an open coat. It is designed to be durable, providing outstanding life, while it produces excellent and consistent finishes. WoodPro is best suited for sanding wood. Keystone Abrasives warranties all of our sanding belts for manufacturer’s defects and your satisfaction is completely guaranteed!