Perfect for getting that plunky old sound. Ernie Ball Earthwood 5-String Banjo Strings are crafted from 80% copper, 20% zinc wire wrapped around hex shaped tin plated steel core wire. The most popular acoustic provides a crisp, ringing sound with pleasing overtones. All Ernie Ball strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life. 2063 - 09 / 11 / 13 / 20w / 09. 2061 - 10 / 13 / 15 / 24w / 10.