2 X 72 Inch Flexible Metal Sanding Belts, 6 Pack. Aluminum Oxide (A/O). Closed coat, flexible J weight cloth backing. Sold in packs of 6. High quality and long lasting all purpose industrial abrasive sanding belts provide an even finish on hardwood, solid surface, ferrous, and non ferrous metal (aluminum, copper, titanium, nickel) when used with pneumatic and electric belt sanders. Closed coating provides a smooth and balanced sanding finish. Resin over resin bonding. Bi-directional tape joint. Hand built in the USA.