Medium gauge 12 String set, ideal for heavy strumming and a 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 .012/.12, .016/.016, Phosphor Bronze Wound .025/.010(p), .032/.014(p), .042/.020(p), .052/.030(w) /