Martin Acoustic Guitar Medium String pack 80/20

Martin’s M150 Medium Gauge 80/20 strings offer a softer on the finger alternative to their standard string packs. 80/20 Bronze means 80% of the string is made up of copper, and 20% of the string is made up of zinc – giving the finish to the string a softer feel.

Gauge: .013, .017, .026, .035, .045, .056