Latex bond for weld blending and finishing Allows for the coolest blending and finishing Special cotton formula will never load on soft, non-ferrous metals like aluminum For use on stainless steel, ferrous metals, non-ferrous metals Type 27 shape The A54 UA-GFX cotton fiber wheel has a latex bond for superior weld blending and finishing. Multiple layers of cotton impregnated with abrasive grain and special bonding agents allow for the coolest blending and finishing. Special cotton formula minimizes loading on soft, non-ferrous metals like aluminum. Type 27 shape. Used for stainless steel, and ferrous and non-ferrous metals. Package of 10.