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 (4) 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. 4 Sets of Strings Gauges:.028, .032, .040, .030, .036, .042 Medium tension