D'addario EJ12, set of strings for acoustic guitar, offers the perfect balance between volume, projectionand comfort in playability. The 80/20 Bronze alloy, also known as brass, is the original alloy chosen by John D'Addario Sr.and John D'Angelico in the 1930s. The 80/20 Bronze strings are very popular due to their clear sound, deepand excellent projection. All acoustic strings with D'addario wrap have a hexagonal core of steel that providesincreasedstrengthandexcellent intonation.