D'Addario NB1356 Nickel Bronze Acoustic Guitar Strings, Medium, 13-56

Delivers a full tonal spectrum, revealing the unique tonal qualities of your acoustic guitar
Increased corrosion resistance for a longer lasting uncoated string
Feature D'Addario's exclusive high-carbon NY steel for unprecedented strength and tuning stability
Environmentally-friendly, corrosion-resistant packaging keeps strings fresh
Made in the U.S.A. for the highest quality and performance