Phosphor Bronze Extra Light 10-50 for steel stringed acoustics. 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. 2150 Earthwood Phosphor Bronze Extra Light:

    E: 10
    B: 14
    G: 20 wound
    D: 28 wound
    A: 40 wound
    E: 50 wound