Custom 4 string set for electric bass guitar from Cobalt Electric Bass Slinky series that is engineered to maximize output and clarity and represent the latest innovation in string technology. Strings provide an extended dynamic range, incredible harmonic response, increased low end and crisp, clear highs. Strings are made from cobalt plated steel wire wrapped around a round steel core wire and are soft and silky to the touch. Cobalt is more flexible than nickel and the most magnetically active string alloy, therefore provides a stronger relationship between pickups and strings, plus is more sweat and moisture resistant. Strings are precisely manufactured to the highest standards and most exacting specifications to ensure consistency, long life and optimum performance. Gauges: .055, .075, .090, .110.