Ernie Ball 2146 Earthwood Phosphor Bronze Acoustic Guitar Strings, Medium Light (12 - 54)
Made from 92% copper, 7.7% tin, 0.3% phosphorus wire wrapped around tin plated hex shaped steel core wire. Has a light orange, gold color and provides mellow, ringing sound, with excellent clarity. (12, 16, 24, 32, 40, 54)