Ernie Ball Ernesto Palla Black and Silver Nylon Classical Guitar StringErnie Ball Ernesto Palla concert quality classical guitar treble strings are made of black nylon monofilament. Gold wound basses are made of 80 20 bronze wrapped around a nylon multifilament core providing a smooth, rich tone. All strings are precision manufactured to the highest standards and most exacting specs to assure consistency, optimum performance and long life. Gauges First . 028, Second . 032, Third . 040, Fourth . 030, Fifth . 036, Sixth .