Ernie Ball Earthwood 80/20 Bronze Acoustic Guitar Strings are made from 80 percent copper, 20 percent zinc wire wrapped around a 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.

Features:
• Wound Strings are 80 percent copper, 20 percent zinc wire wrapped around hex tin plated steel core wire
• Plain strings are made of specially tempered tin-plated high carbon steel
• Featuring the finest and freshest materials