Kala Solid Body U•BASS® Flat Wound Strings by La Bella answer Kala's need for a traditional electric U•BASS® string. Made with a steel core, and stainless-steel flat wire, the Kala Solid Body U•BASS® Flat Wounds offer that classic old school P Bass tone. Complete with a buttery smooth feel and a balanced tone with a fantastic low end, the Kala Solid Body U•BASS® Flat Wounds will be as pleasing to play as they are to listen to. *Designed exclusively for Kala Solid Body U•BASS® with magnetic pickup. **Not compatible with California U•BASS® models.