Martin Authentic Acoustic strings are engineered with the performer in mind and they will always stand up to rigorous practice and performance schedules. The tensile-strength core wire is tin-plated on all six strings for added corrosion resistance.

Martin Authentic Acoustic SP strings offer excellent tuning stability, corrosion resistance and great playability.

Features

Gauge: Extra light
Gauges: 10, 14, 23, 30, 39, 47
Tension: 138.2