Ernie Ball Earthwood Medium Phosphor Bronze Acoustic guitar Strings, 13-56 gauge

Ernie Ball Earthwood Phosphor Bronze acoustic guitar strings are made from 92% copper, 77% tin, 05% phosphorus wire wrapped around brass-plated hex-shaped steel core wire Phosphor Bronze produces a rich tone with excellent clarity gauges 013, 017, 026, 034, 046, 056