XS 80/20 bronze strings from D'Addario are bright acoustic guitar strings made to give your tone an unparalleled shine. With the addition of revolutionary XS coating, these bold, bright 80/20 strings obtain maximum life, with an uncommonly smooth feel. Made with a NY Steel core, 80/20 Bronze wrap wire and Fusion Twist technology, these coated acoustic guitar strings have enhanced break strength and tuning stability over standard 80/20s, in addition to a dramatically increased lifespan. This 10-47 Light gauge 12-string set is great for 12-string acoustic guitars.