Martin Era Treated Acoustic Phosphor Bronze Medium 13-56 Guitar Strings

Engineered for exceptional tone and effortless playability, Martin Era™ strings raise the bar for phosphor bronze acoustic guitar strings. Drawing from Martin’s most advanced string technologies, they incorporate a patented Lifespan® treatment for long-lasting corrosion resistance, Flexible Core construction for improved comfort and smooth fretability, and silk-wrapped ball ends that pay tribute to vintage instruments while honoring Martin’s rich heritage of handcrafted string making. The Artist Light gauge, created in partnership with six-time GRAMMY® winner Jason Isbell, features a traditional SP® core designed to capture the response and character of his signature sound.

Gauge and Tension

 E          B         G         D       A          E     Tension

.013    .017    .026    .035    .045    .056    190.40