Martin MSP7200 Lifespan Phosphor Bronze Acoustic Guitar Strings Medium 13-56 (Discontinued)
The all-new Martin SP Lifespan acoustic guitar strings are treated with Cleartone proprietary technology to bring you the longest possible string life without sacrificing tone or natural feel.
Martin SP Lifespan strings are designed to repel the oils and dirt that can deaden strings. All six strings are treated to preserve the natural Martin SP sound and feel that players prefer.
.013 .017 .026 .035 .045 .056