Attention! Some of the following description is no longer factual. The new EJ23 is now D'Addario's lightest gauge of acoustic strings. EJ15s are ideal for beginners or any player that prefers a softer tone and easy bending. D'Addario's lightest gauge acoustic guitar string set, known for its superb, long-lasting tone and playing ease Preferred for its warm, bright, and well balanced acoustic tone. • MFSKU EJ15 • UPC 019954121136