Check the listing for details. D'Addario EJ15 Phosphor Bronze Extra Light Acoustic Guitar Strings 10-47. Condition: New. Listed at 9.74 USD. D'Addario EJ15 Extra Light Phosphor Bronze Acoustic Guitar Strings (10-47) D'Addario's lightest gauge of acoustic strings, EJ15s are ideal for beginners or any player that prefers a softer tone and easy bending.Phosphor Bronze was introduced to string making by D'Addario in 1974 and has become synonymous with warm, bright, and well balanced acoustic tone. D'Addario Phosphor Bronze strings are precision wound with corrosion resistant phosphor bronze onto a carefully drawn, hexagonally shaped, high carbon steel core. The result is long lasting, bright sounding tone with excellent intonation.D'Addario's lightest gauge acoustic guitar string set, known for its superb, long-lasting tone and playing easePreferred for its warm, bright, and well balanced acoustic toneEnvironmentally friendly, corrosion resistant packaging for strings that are always freshMade in the U.S.A. for the highest quality and performanceString Gauges: Plain Steel .010, .014, Phosphor Bronze Wound .023, .030, .039, .047