Made in the U.S.A Ernie Ball 2403 Ernesto Palla Clear & Silver Nylon Strings Ernesto Palla concert quality classical guitar strings are made of a solid nylon filament. Silver fourth, fifth, and sixth wound strings are made of silver plated copper wrapped around a nylon floss core providing a smooth, rich tone. This Auction is for (12) sets of strings Features: Model: P02403 Ernesto Palla concert quality classical guitar strings are made of a solid nylon filament Silver fourth, fifth, and sixth wound strings are made of silver plated copper wrapped around a nylon floss core providing a smooth, rich tone. All Ernie Ball strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance, and long life. Made in the U.S.A. 12 Sets of Strings Gauges: First = .028, Second = .032, Third = .040, Fourth = .030, Fifth = .036, Sixth = .042 Medium tension.