MA540
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: Light
Gauges: 12, 16, 25, 32, 42, 54
Tension: 168.5