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: Medium
Gauges: 13, 17, 26, 35, 45, 56
Tension: 190.9