BAJAAO India presents the D'Addario EXL170SL. Gauges: 45-65-80-100. Super long scale. Round-wound. Nickel-plated steel wrap wire. Bright, true sound. 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.