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Martin Authentic Acoustic strings are engineered with the performer in mind and they will always stand up to rigorous practice and performance schedules.

Martin start with their highest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance; because what you don’t see matters. When coupled with the highest quality wrap wire you get consistent true tone that you can count on song after song.

Available in 80/20 Bronze and 92/8 Phosphor Bronze.

Medium gauge: 13-17-26-35-45-56



  • Excellent tune stability
  • Engineered to resist corrosion
  • Great playability


UPC:  729789557818  

MA150 SP 80/20 Bronze Authentic Acoustic Guitar Strings Medium 13-56 : Martin

SKU: MA150