Martin Retro acoustic guitar strings are crafted from a long-lasting proprietary nickel-based Monel alloy blend that mellows quickly to a warm vintage tone that brings out the unique, woody sounds in your guitar. The qualities of this unique alloy give the strings a soft touch that make bends and slides feel effortless

Ideal for a sweet, vintage tone on both vintage and modern guitars.

Gauge
.012- .015- .025- .031- .041- .054
Tension 163.33