D'Addario XTABR1356 80/20 Bronze Medium 13/56 Acoustic guitar strings D'Addario 80/20 Bronze strings are known for their bright sound, giving your acoustic guitar an unmatched brilliance. With the addition of our XT coating, these 80/20 strings offer extended corrosion resistance, resulting in a significantly longer lifespan compared to standard acoustic strings. XT 80/20 Bronze strings feature a durable NY Steel core and are wound with high-quality 80/20 bronze alloy. Thanks to the Fusion Twist technology, they are not only highly durable but also less prone to breakage and better at maintaining their pitch. Despite these technical enhancements, they retain the characteristic bold, bright, and radiant tone that 80/20 bronze is known for. The 13-56 Medium gauge set provides maximum volume and projection, with more tension and resistance. These strings are the perfect choice for fingerstyle techniques as well as all other playing styles on the acoustic guitar. With D'Addario XT 80/20 Bronze strings, guitarists experience an outstanding combination of durability, sound quality, and playability.