Ernie Ball Everlast Light Coated Phosphor Bronze Acoustic Set, .011 - .052 1,000 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 Rich, Warm tone played by acoustic greats around the world Element Shield Packaging Prolongs string life and keeps strings as fresh as the day they were made Made in California, U.S.A. Featuring the finest and freshest materials.