The Ernie Ball Earthwood 5-String Banjo Bluegrass Loop End 80/20 Bronze Acoustic Guitar Strings are made from 80 percent copper, 20 percent zinc wire wrapped around a hex shaped tin plated steel core wire. The most popular acoustic guitar strings provide a crisp, ringing sound with pleasing overtones. Gauges .009, .011, .013, .020w, .009.
