Image shown is actual grain. These are industrial grade 4" x 36" GK sanding belts. GreenKut is a NEW ceramic grain coated abrasive material, with an open coat. In many cases, GreenKut can provide 5-10 times the life over standard aluminum oxide when sanding wood. 60 grit is available on a "Y" weight backing, while 80, 100, 120, 150, & 180 grit are on a heavy "X" weight backing. Keystone Abrasives warranties all of our sanding belts for manufacturer’s defects and your satisfaction is completely guaranteed!