Ernie Ball 7-String Super Slinky Nickel Wound Set, .009 - .052 Made in California, U.S.A. Featuring the finest and freshest materials. Played By Legends around the world including Slash, Jimmy Page, Metallica, Eric Clapton, and more... Element Shield Packaging Prolongs string life and keeps strings as fresh as the day they were made Recipes and Popular gauges created by industry icon Ernie Ball