These strings are engineered with the performer in mind and they will always stand up to rigorous practice and performance schedules. They start with their highest tensile-strength core wire, then tin-plate it on all six strings for added corrosion resistance; because what you don’t see matters! When coupled with the highest quality wrap wire you get consistent true tone that you can count on song after song. Available in 80/20 Bronze and 92/8 Phosphor Bronze. Martin Authentic Acoustic SP strings offer excellent tuning stability, corrosion resistance and great playability.
- 92/8 Phosphor Bronze
- Custom Light
- Highest tensile-strength core wire tin-plated on all six strings for added corrosion resistance
- Excellent tuning stability, corrosion resistance and great playability.
| Custom Light | .011 | .015 | .023 | .032 | .042 | .052 | 155.1 | MA535 |











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