· FOLK GUITAR STRINGS - Folk Nylons bring the sweet sound of nylon to acoustic guitars with ball-end bridges.· WARM & MELLOW - These strings afford extra warmth and mellowness to non-classical acoustics.· BALL ENDS - This set features ball ends, nylon core basses wound with silver-plated copper, and black nylon treble strings.· EARN REWARD POINTS - D’Addario Folk Nylon sets come with a code on the recyclable VCI bag, which you can register to earn Players Circle points.· MADE IN THE USA – Our classical guitar strings are made in the USA—drawn to exacting specifications at our New York production facility.