80/20 Bronze are our brightest acoustic strings, made to give your guitar an unparalleled shine. These bold sounding strings were developed by John D'Addario Sr. and guitar maker John D'Angelico in the 1930s, and have been beloved for their sparkling, trebly tone ever since. Made with a high carbon steel core and 80/20 Bronze wrap wire, 80/20 acoustic strings offer remarkable depth, along with rich, bright harmonics, and powerful projection. Designed for all makes and models of 12-string acoustic guitars, this 10-47 Light gauge is our most popular 12-string gauge, offering the ideal balance of volume, projection and comfortable playability.