D"Addario EXL160BT Balanced Tension sets are comprised of mathematically optimized string gauge combinations, resulting in greater control and playing comfort. Combined with the distinctive bright, booming tones of XL nickel wound strings, each set offers greater dynamic control and a more consistent feel between strings for evenly balanced bending, fretting, plucking and slapping.magnetic output delivering a universally appealing and versatile tone for all playing styles. D"Addario XL Nickel Wound Electric Bass strings are world-renowned as "The Player"s Choice" amongst bass players of all genres and styles. All XL strings are precision wound on their exclusive digitally-controlled machines, ensuring each string has excellent intonation, clear fundamentals, and unparalleled consistency. Each string is wound with a nickelplated steel wrap wire known for distinctive bright tone with excellent magnetic output delivering a universally appealing and versatile tone for all playing styles. String Gauges: Wound .050, .067, .090, .120Balanced Tension sets allow for evenly balanced bending, fretting, plucking and slapping. Round wound with nickelplated steel for distinctive bright tone Environmentally friendly, corrosion resistant packaging for strings that are always fresh Made in the U.S.A. for the highest quality and performance String Gauges: Wound .050, .067, .090, .120