D'Addario EJ83M Gypsy Jazz Acoustic Guitar Strings, Ball End, Medium, 11-45 Designed and gauged for "Django", jazz-style guitars. With ball end Warm, projecting tone 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 .011, .015, Silver-plated Copper Wound .024, .029, .035, .045