C.F. Martin Acoustic Guitar Martin Flexible Core FX 80/20 Bronze .012 - .054, MFX-640
C.F. Martin Acoustic Guitar Martin Flexible Core FX 80/20 Bronze .012 - .054, MFX-640star rating 4Chris CreightonDecember 22, 2009Reliable, easy to play, decent tone and great price. They are the standard string I use in my repair shop.