Fender 100"s are high quality nylon strings for classicalguitars. * We"ve added ball-ends to make our 130"s forfolk guitars. * We start with the best nylon material we can find and usestate-of-the-art manufacturing to make you the highestquality strings possible. * Our basses are wound in puresilver for an outstanding clarity that can bring even darkand dull sounding guitars to life.