Adamas 1717 Extra Light Gauge Acoustic Guitar Strings Phos. Bronze 10-47 -3 Pack Extra-light Gauge: .010, .014, .023, .030, .038, .047 Made from phosphor bronze Harmonically balanced cores Adamas Phosphor Bronze wrap wire produces a rich, full sound with even tone throughout the harmonic range. Composite Gauging technique utilizes core and wrap wire of identical size so that neither part of the string dominates the various modes of string vibration.