EXL115 is the popular choice for players who prefer moderate flexibility and a full, beefy tone. Round wound with nickel plated steel for distinctive bright 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 0.011, 0.014, 0.018, Nickel Wound 0.028, 0.038, 0.049.