From Ernie Ball website: " Ernie Ball Slinky Flatwound Bass Strings combine the smooth feel of traditional flats and the power of Cobalt. Featuring a SuperBright Cobalt ribbon wrap, Cobalt underwraps and optimal hex-core to wrap ratio, the new Flatwound Bass strings are the first flat that actually feels like a flat and sounds like a round."

Gauges: 45-130

This set is designed for a 5-string bass.

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.