Martin MA550 13-56 Medium Authentic Acoustic SP 92/8 Phosphor Bronze Guitar Strings

Martin MA550 Authentic Acoustic SP Medium 13 Phosphor Bronze MA550 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. Their impeccable standards for acoustic guitar tone are embedded in their string design and precision manufacturing process.  Medium .013 .017 .026 .035 .045 .056 190.9 MA550