Strings › Ernie Ball Medium Earthwood 80/20 Bronze Acoustic Guitar Strings 13-56 Gauge Ernie Ball Medium Earthwood 80/20 Bronze Acoustic Guitar Strings 13-56 Gauge $7.99 Ernie Ball Earthwood 80/20 Bronze Acoustic Guitar Strings are made from 80% copper, 20% zinc wire wrapped around hex shaped brass plated steel core wire. These acoustic guitar strings provide a crisp, ringing sound with pleasing overtones. Gauges .013, .017, .026, .034 .046, .056 Purchase Added! Ernie Ball Earthwood 80/20 Bronze Acoustic Guitar Strings are made from 80% copper, 20% zinc wire wrapped around hex shaped brass plated steel core wire. These acoustic guitar strings provide a crisp, ringing sound with pleasing overtones. Gauges .013, .017, .026, .034 .046, .056 Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More