D’Addario EJ13 80/20 Bronze - Custom Light Gauge Acoustic Guitar StringsDAddario EJ13 Acoustic Guitar Strings Custom gauge strings to bring out the rock star in you Commonly known as EJ13 custom light, DAddario strings offer comfort while playing and emits a deep, distinctive sound. With superior intonation and a long lasting high carbon steel core, these durable strings can be used to play number genres and guitar styles. Its vintage feel is a throwback to past musicians and lets you let off those riffs to bring out the