Ernie Ball Earthwood Phosphor Bronze 12-Stringed Light-Strings For 12-Stringed Acoustic Guitars Ernie Ball Earthwood Phosphor Bronze Acoustic Guitar Strings are made from 92% copper, 7.7% tin, 0.3% phosphorus wire wrapped around tin plated hex shaped steel core wire. These guitar strings have a light orange, gold color and provide a mellow, ringing sound, with excellent clarity.
