D'Addario EJ17 Phosphor Bronze Acoustic Guitar Strings, Medium, 13-56

D'Addario EJ17 acoustic guitar strings are designed with heavier tension, producing a bolder, more resonant tone that can handle the demands of heavy strumming and flat-picking. These strings are precision-wound with corrosion-resistant phosphor bronze onto a carefully drawn, hexagonal high-carbon steel core. This construction ensures a long-lasting, bright tone with excellent intonation. Introduced by D'Addario in 1974, phosphor bronze has since become synonymous with a warm, bright, and well-balanced acoustic guitar sound. D'Addario EJ17 Guitar String Specs  D'Addario's most popular choice for heavy strumming, flat-picking and resonant, projecting tone 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 .013, .017, Phosphor Bronze Wound .026, .035, .045, .056