Ernesto Palla concert quality classical guitar strings are made of a solid nylon filament. Gold fourth, fifth, and sixth wound strings are made of 80/20 bronze 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.
 
UPC:  749699124092