1/2 X 18 Inch 220 Grit Aluminum Oxide Air File Sanding Belts, 20 Pack Sanding…

Aluminum Oxide (A/O). Closed coat, X weight Cloth backing. Closed Coating provides a smooth and balanced sanding finish. Resin over resin bonding. Bi-directional tape joint. Assembled in USA. PREMIUM MATERIAL: Sanding belts are made with premium blue fired aluminum oxide closed coat material with a grinding aid to reduce heat and buildup, ensuring superior performance.