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. XL158s are designed to suit most modern electric baritone guitars or can be used for deep drop tuning on most standard guitars.Diameter TensionItem# Note inches mm lbs kgPL013 B 0.013 0.33 20.9 9.49PL017 F# 0.017 0.43 20 9.08NW026 D 0.026 0.66 25 11.35NW036 A 0.036 0.91 26.5 12.03NW046 E 0.046 1.17 23.8 10.81NW062 B 0.062 1.57 24.6 11.17