From Ernie ball site: "Ernie Ball Cobalt Slinky Electric Guitar Strings provide an extended dynamic range, incredible harmonic response, increased low end, and crisp, clear highs. Cobalt provides a stronger magnetic relationship between pickups and strings than any other alloy previously available. " 

Gauges: 10-46

If you have any question regarding these strings and if they are suitable for your particular instrument, shoot a message and we will be happy to answer any questions you may have.