Made from 80% copper, 20% zinc wire and wrapped around hex shaped brass plated steel core wire. There is a reason why these Ernie Ball Earthwood Medium Light 12-54 Acoustic Strings are the most popular acoustic guitar strings. Engineered to provide a crisp, ringing sound with dreamy overtones. 

This 3 pack of Earthwood Acoustic Bronze strings are precision wound with 80/20 bronze wire, allowing them produce a natural bright, balanced tone with superior consistency and intonation while the brass plated high carbon steel hex wire core provides excellent durability.

• 80% copper, 20% Zinc
• Hex shaped carbon steel core
• Bright balanced tonal qualities
• 3 pack

• String gauges .012 .016 .024w .032 .044 .054