Designed to maximize production and clarity, Ernie Ball's Slinky Cobalt guitar strings are the latest innovation in string technology. Seeking to provide guitarists with a new sound, cobalt strings provide an extended dynamic range, an incredible harmonic response, an increase in low range and crisp and clear levels. Cobalt provides a stronger magnetic relationship between pads and ropes than any other previously available alloy. Cobalt Slinkys are also soft and silky to the touch, which makes touching the string easier. Gauges. 009, .011, .016, .026, .036, .046