D'addario XSAPB1356 Phosphor Bronze Acoustic Medium Set

XS Phosphor Bronze strings have the longest life of any D’Addario acoustic guitar string. The XS coating gives phosphor bronze strings maximum life, with an uncommonly smooth feel. Made with a NY Steel core, phosphor bronze wrap wire, and Fusion Twist technology, XS coated acoustic guitar strings have incomparable break strength and tuning stability, in addition to their dramatically increased lifespan. Complete gauges are .013, .017, .026, .035, .045, .056.