Martin Authentic Acoustic SP Bronze 13-56 (MA150)

Designed to cope with demanding practices and schedules. Martin Authentic Acoustic SP 80/20 strings feature their highest tensile-strength core wire and are tin-plated for enhanced corrosion resistance. These Acoustic SP strings provide players with good tuning stability as well as a true and consistent tone throughout gigs. Manufactured with 80%... morecopper and 20% zinc these acoustic guitar strings yield a bright and ringing tone. These Acoustic SP strings include gauge 13-17-26-35-45-56.