Martin Authentic Acoustic 80/20 Bronze Light strings are engineered with the performer in mind, and they are made to stand up to rigorous practice and performance schedules. Martin starts 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 Martin's highest-quality wrap wire you get consistent true tone that you can count on song after song.

 

Extra Light (MA170): 10-47

Light (MA140): 12-54

Medium (MA150): 13-56