Ernie Ball Folk Nylon acoustic guitar plain strings are made of a solid nylon clear filament. Nylon produces rich pure treble tones with percussive attack. Ernie Ball folk nylon wound strings are made of 80/20 bronze wrapped around a multifilament nylon core. The plain and wound strings both feature ball ends for faster installation. Gauges 0.028, 0.032, 0.040p, 0.030 0.036 and 0.042. Features: Nylon acoustic guitar plain strings Made of a solid nylon clear filament Nylon produces rich pure treble tones with percussive attack Folk nylon wound strings are made of 80/20 bronze wrapped around a multifilament nylon core Plain and wound strings both feature ball ends for faster installation