Martin MA550T Authentic Lifespan 2.0 92/8 Phosphor Bronze Medium

Next generation Martin® Authentic Acoustic® Lifespan® 2.0 strings are engineered using a new, patented anti-corrosion treatment only available from Martin. It protects the core and wrap wire to prevent corrosion without compromising tone or feel. Impeccable standards for acoustic guitar tone are embedded in string design and precision manufacturing process.