Ernie Ball 2008 Earthwood 80/20 Bronze Rock and Blues Acoustic Guitar Strings 6 Pack A 6-pack of high-quality, long-lasting strings Ernie Ball 2008 Earthwood Rock and Blues Acoustic Guitar strings are crafted from 80% copper, 20% zinc wire wrapped around hex-shaped, tin-plated steel core wire Among the most popular acoustic strings from Ernie Ball, they provide a crisp, ringing sound with pleasing overtones All Ernie Ball strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life Gauges 10-13-17-30-42-52