Gauges 11-14-23-28-38-47.D'Addario EJ40 Silk & Steel nylon folk guitar strings produce a softer sound and feel. Durable and long-lasting, they retain their brilliance longer than other brass and bronze alloys.D'Addario is the world's largest manufacturer of strings for musical instruments. Many top guitarists won't play any other brand. Regardless of your playing style, D'Addario has a set of strings that's right for your folk guitar.