Warm, rich tone with excellent projection and clarity,Light gauge provides playability and comfortable fretting while maintaining rich, expressive tone,Phosphor bronze wound on a hex-shaped, high-carbon steel core wire,Element Shield Packaging prolongs string life and keeps strings as fresh as the day they were made,Made in California, USA with the freshest and finest materials
Ernie Ball Earthwood Phosphor Bronze acoustic guitar strings are made from 92% copper, 7.7% tin, 0.5% phosphorus wire wrapped around brass-plated hex-shaped steel core wire. Phosphor Bronze produces a rich tone with excellent clarity. Gauges .011, .015, .022w, .030, .042, .052.