Gauges 28-34-30-35. D"Addario Baritone Ukulele strings are designed specifically for that instrument. They"re made from clear rectified nylon and silver-plated 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.