The Ernie Ball 2715 Slinky Cobalt Electric Guitar Strings incorporate a patent-pending iron and cobalt wrap which extends the harmonic range of your strings and allows for a stronger magnetic relationship with pickups for some of the best response on the market.

• Sizes - .010, .013, .017, .030, .042, .052
• Cobalt-plated steel wire wrapping for an extended harmonic range
• Made in southern California with environmentally friendly packing