Ernie Ball 2146 Regular Slinky Acoustic Guitar Strings 12-54 2 Pack String Gauges: .012, .016, .024, .032, .044, .054 Ernie Ball 2146 Regular Slinky Phosper Bronze Acoustic Guitar Strings give a warm rich tone and reduced string noise. Get this 2-pack for a great savings and be prepared for your next string change! Engineered to meet the demands of acoustic musicians worldwide, these concert quality strings provide deep, rich bass notes with clear bright trebles.