Gauges: 50-70-85-105. Short scale. Round-wound. Nickel-plated steel wrap wire. Bright, true sound. Genuine phosphor bronze alloy retains flexibility as well as brilliant tone for many hours of hard play. Computer-controlled wrapping around a hex core ensures consistency and extends life. 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 bass.