D'Addario's most popular acoustic set, EJ16 delivers the ideal balance of volume, projection and comfortable playability. D'Addario's most popular acoustic guitar string set, known for its superb, long-lasting tone and comfortable playability Preferred for its warm, bright, and well balanced acoustic tone Environmentally friendly, corrosion resistant packaging for strings that are always fresh Made in the U.S.A. for the highest quality and performance String Gauges: Plain Steel .012, .016, Phosphor Bronze Wound .024, .032, .042, .053