Image shown is actual grain. GreenKut is a NEW ceramic grain coated abrasive material designed specifically for wood working applications, 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 on a "Y" weight backing and 80, 100, 120, 150 & 180 grits are on a heavy "X" weight backing. Because of the outstanding life and durability the GreenKut is fast becoming a popluar choice for woodworkers. Keystone Abrasives warranties all of our rolls for manufacturer’s defects and your satisfaction is completely guaranteed!