Martin Guitar Strings Authentic Acoustic SP - MA140 (3 Sets)

These Martin Authentic SP strings are engineered with the performer in mind and they will always stand up to your rigorous practice and performance schedules. Martin starts with thehighest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance. When coupled with the highest quality wrap wire you get consistent true tone that you can count on song after song.