The D'Addario EJ11 is a light gauge 80/20 Bronze set that features the most popular acoustic guitar string sizes. 80/20 bronze, the original acoustic alloy introduced by John D'Addario Sr. and John D'Angelico in the 1930s is a popular alloy for recording due to their crisp, deep and projecting tone that appeals to many traditionalists and vintage enthusiasts for their historical significance. Each 3-pack also comes with a 10-piece pack of D’Addario medium-gauge picks in a variety of colors.