Add to cart D’Addario XS Coated Phosphor Bronze Mandolin Strings $39.99 inc GST Born from our greatest breakthrough in string innovation, XS Phosphor Bronze strings have the longest life of any D’Addario mandolin string. The XS coating gives these warm, balanced phosphor bronze strings maximum life, with a beautifully smooth feel. Made with a NY Steel core, phosphor bronze wrap wire and Fusion Twist technology, XS coated mandolin strings also have incomparable break strength and tuning stability.