Martin MLJ13 Retro LJ's Choice Acoustic Guitar Strings. 13-56

These strings harken back to the 1930s, when nickel ruled the acoustic world. Made from Monel, a solid nickel/copper wrap, the MLJ13s let your acoustic’s natural wood tone ring through with a full low end, a high-end snap, and a solid midrange. The proprietary wrap on the MLJ13s is corrosion-resistant and impressively strong for a long life of uncompromised tone.