These 2-1/4 Inch x 80 inch Zirconia cloth sanding belts are made with premium German engineered Starcke material. All our sanding belts are made custom to order in grits 24 - 120. This Zirconia abrasive material has a Poly Cotton "X" weight backing. Abrasive Resource sanding belts feature a bi-directional butt joint for a consistent and smooth finish as well as an extended belt life. A full resin bond allows for long lasting performance. This high performance abrasive belt is excellent for both carbon steel and hardwood.