Rock and Blues w/Plain G Earthwood Phosphor Bronze Acoustic Guitar Strings 10-52 Gauge 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. Gauges .010, .013, .017, .030, .042, .052
