D'ADDARIO BASS STRINGS TWIN PACK D'Addario XL Nickel 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 our exclusive computer-controlled machines, ensuring each string has excellent into nation, clear fundamentals, and unparalleled consistency. The nickelplated steel wrap wire is known for it's distinctive bright tone and excellent intonation and delivers a universally appealing tone for all playing styles.