Ernie Ball 2012 Earthwood 12-String Medium 80/20 Bronze Acoustic String Set  (11 - 52)
Made from 80% copper, 20% zinc wire wrapped around hex shaped tin plated steel core wire. The most popular acoustic guitar strings provide a crisp, ringing sound with pleasing overtones. Gauges .011*.011, .015*.015, .024w*.010, .030*.014, .042*.022w, .052*.028