D'Addario XL ProSteels utilize a highly magnetic, corrosion-resistant steel alloy that delivers super-bright tone without shrill overtones. They offer a palette of harmonically rich, brilliantly penetrating highs combined with pronounced, tight-and-tough lows. If you need a little more crunch, bite, and sustain, ProSteels are the string for you! 
 

  Diameter Tension Item# Note inches mm lbs kg Pl010 E 0.010 0.25 16.2 7.35 PL013 B 0.013 0.33 15.4 6.98 PL017 G 0.017 0.43 16.6 7.53 PSG026 D 0.026 0.66 16.9 7.67 PSG036 A 0.036 0.91 18.3 8.30 PSG046 E 0.046 1.17 16.3 7.39