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.