D'Addario Single XT Phosphor Bronze 056

.056 XT Phosphor Bronze String. XT Coated Phosphor Bronze for extended life while maintaining an ideal balance of warmth, brightness and volume with minimal effect on tone or playability. High carbon steel wire and Fusion Twist technologies deliver unrivaled tuning stability and break resistance. Strings stay in tune 131% better than traditional strings! Perfect as a replacement string or for creating customized sets for acoustic guitar. All D'Addario strings are designed, engineered, and manufactured in the USA