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. Our "Plus" gauges offer a slight variation in tension between gauges. These are ideal for equalizing tension between guitars of varying scale lengths or if you're looking to jump to heavier gauges in small increments. Diameter Tension Item# Note inches mm lbs kg PL0105 E 0.0105 0.27 17.9 8.12 PL0135 B 0.0135 0.34 16.6 7.53 PL018 G 0.018 0.46 18.6 8.44 NW028 D 0.028 0.71 21.3 9.66 NW038 A 0.038 0.97 21.6 9.80 NW048 E 0.048 1.24 18.9 8.57