XSAPB1256, Set Acoustic Guitar XS Phosphor Bronze 12-56, Light Top/Medium Bottom.
XS is breathing new life into coated strings. With its ultra-thin film coating on every wound string and unique polymer treatment on the plain steels, XS offers our highest level of protection for maximum life with an uncommonly smooth feel. XS is the most innovative coated string ever created.
• Plain Steel .012, .016, Phosphor Bronze Wound .025, .035, .045, .056.