Hybrid gauge combines EXL110 for flexibility with heavier 4th, 5th and 6th strings for a more solid low end * Round wound with nickelplated steel for distinctive bright tone * Corrosion resistant packaging for strings that are always fresh * String Gauges: Plain Steel .010, .013 .017, Nickel Wound .030, .042, .052 * Made in the U.S.A. for the highest quality and performance