| D'Addario heaviest gauge of flatwounds delivers smooth feel, warm/mellow tone and maximum tension Ribbon wound and polished for ultra-smooth feel and warm, mellow 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, Stainless Steel Flat Wound .026, .035, .045, .056 |