D'Addario 10-47 Light Coated 12-String Acoustic Guitar Strings XSAPB1047-12DAddario XSAPB1047 12 XS Light Coated 12 String Phosphor Bronze Acoustic Guitar Strings 10 47Born from our greatest breakthrough in string innovation, XS Phosphor Bronze strings have the longest life of any D'Addario acoustic guitar string. The XS coating gives our warm, balanced 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