Ernie Ball Everlast 2556 80/20 Bronze Acoustic Guitar Strings 12-54

500 times thinner than any other string coating. Everlast treatment is applied to both the inner hex core and outer wrap wire to provide ultimate protection without compromising tone or feel. Vibrant, expressive tone played by acoustic exceptionals around the world. Made from 80 percent copper, 20 percent zinc wire wrapped around hex-shaped tin-plated steel core wire. Made in California, USA with the freshest and finest materials.