Martin Authentic SP Acoustic Guitar Strings, 80/20, Custom Light, 11-52 - MA175

Custom Light. 011. 015. 023. 032. 042. 052 (153.7 Tension) MA175. 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.

eBay