Martin Traditional 80/20 Bronze acoustic guitar strings are made with bronzed steel core wire and bronze wrap wire.
Martin Bronze, Light 12-String Strings
Material – 80/20 Bronze
For 12 String Acoustic Guitar
Gauges: 2x .012, 2x .016, 1x .025w, 1x .010, 1x .032w, 1x .014, 1x .042w, 1x .020, 1x .054w, 1x .030w
8 in stock (can be backordered)