Image shown is actual grain. These are industrial grade 4" x 132" WP sanding belts. High performance aluminum oxide material. It is designed to be durable, providing oustanding life, while it produces excellent and consistent finishes. WoodPro is an open coat, with a heavy poly cotton "X" weight backing. 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!