D'Addario XT Silver Plated Copper Classical Guitar Strings Normal Tension XTC45XT classical strings combine our infamous pro arte treble strings and silver plated wound composite basses with an extended lifespan treatment, preserving the natural tone and feel of uncoated strings. Available in normal, hard, and extra hard tensions. Addario XT strings offer extended lifespan while maintaining the tone and feel of your favorite uncoated string. By utilizing the proprietary composite basses and precisely intonated trebles of our