Martin MM13 Retro Acoustic Monel 013-056 string set

This Martin MM13 Retro Acoustic Monel 013 string set can be used on western guitars. The steel string is wounded with a monel alloy winding of nickel and copper. 

-string set for western guitar.

-string gauges: 013 – 017 – 026 – 035 – 045 – 056.

-round wound.

-material: steel string, nickel/copper monel winding.