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.

Key Features:

• Higher Tensile Strength
• Tin-Plated Core Wire
• Balanced Tone
• Quicker Response
• Increased Tuning Stability
• Gauge: Medium
  Tension: 190.9
  E: .013
  B: .017
  G: .026
  D: .035
  A: .045
  E: .056

What's in the box:

• 1x Authentic Acoustic Sp Guitar Strings Phosphor Bronze Medium