Gauges 10-14-20w-28-40-50.Ernie Ball 2047 Earthwood Acoustic Guitar Strings are crafted from 80% copper, 20% zinc wire wrapped around a nylon core for a mellower sound. These strings also lessen tension making instruments easier to play. All Ernie Ball strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life.

Gauges 13-17-26-35-45-56.D'Addario EFT17 Flat Top Medium Acoustic Guitar Strings are phosphor bronze strings polished smooth. This produces a smooth, flattened playing surface, but does not sacrifice the warm tone and sustain associated with phosphor bronze strings. Flat Tops are excellent for recording and greatly reduce finger noise.D'Addario is the world's largest manufacturer of strings for musical instruments. Many top guitarists won't play any other brand. Regardless of your playing style, D'Addario has a set of strings that's right for your acoustic guitar.

Gauges 13-17-26-35-45-56.Martin M1200 Marquis 80/20 Bronze Medium Acoustic Guitar Strings offer a composition alloy for brilliance, clarity, and longevity of sound. The Phosphor Bronze winding is ideally suited for making strings that have deep, rich basses and clear, bright trebles. Gauges 13-17-26-35-45-56.