D'Addario EXL120 Nickel Wound Electric Guitar Strings, Super Light 9-42 - 3 Pack D'Addario XL Nickel Wound Electric Guitar strings are world-renowned as "The Player's Choice" amongst players of all genres and styles. XL's are precision wound with nickelplated steel on a hex-shaped core, resulting in strings with a distinctive bright tone and excellent intonation. String Gauges: Plain Steel .009, .011, .016, Nickel Wound .024, .032, .042