EJ22 Jazz Medium 13-56 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. Diameter Tension Item# Note inches mm lbs kg PL013 E 0.013 0.33 27.4 12.43 PL017 B 0.017 0.43 26.3 11.93 NW026 G 0.026 0.66 32.8 14.88 NW036 D 0.036 0.91 34.8 15.78 NW046 A 0.046 1.17 31.1 14.10 NW056 E 0.056 1.42 26.3 11.93