C.F. Martin Acoustic Guitar Martin Flexible Core FX 92/8 Phosphor Bronze 12 String .010 - .054, MFX-700star rating 3Dave PowellAugust 9, 2009The strings are great, the guage was right for open C on my 12 string (i usually swap the 10th string for a wound .018 instead of the unwound it comes with). BUT.... The label is incorrect, the "bronzed" steel strings are actually regular "Silvered" steel, not bronzed, darnit, i was hoping to get bronzed steel on the unwound for my 12 string as they tend to be more balanced in the magnetic pickups.