Martin MA550 SP Phosphor Bronze Medium Authentic Acoustic Guitar Strings 13-56

Martin® Authentic Acoustic® Superior Performance SP® strings feature higher tensile strength and tin-plated core wire on all six strings that enable a fuller and more balanced tone, quicker response and increased tuning stability. Our impeccable standards for acoustic guitar tone are embedded in our string design and precision manufacturing process. That's why we make our own.

Features

• Strings designed by C.F. Martin & Co. to provide superior tone for your acoustic guitar
• Tin-plate-coated for extra longevity and enhanced tone
• Highest-quality materials mean outstanding tone, response, and durability
• Strings subjected to Martin's rigorous premarket testing to ensure consistency and quality

Specifications:

- Guitar Type: Acoustic Guitar
- Number of Strings: 6
- Coated: No
- Gauges: .013, .017, .026, .035, .045, .056
- Core Material: Tin-plated Steel
- Winding Material: 92/8 Phospor Bronze
- Winding Type: Round