Gauges 28-34-30-35. D'Addario Baritone Ukulele strings are designed specifically for that instrument. They're made from clear rectified nylon and silverplated copper wound on nylon, providing warm, long-lasting tone.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 baritone ukulele.