XL Nickel is the industry standard in electric bass strings. With their clear fundamentals, booming tight lows, and reliable D’Addario construction, they’re trusted by players everywhere to handle any performance. The D'Addario 50 to 105 Medium Long Scale Bass Guitars 4-Strings Set is made with a high carbon steel core and wound with nickel-plated steel wrap wire, for consistently bright tone and smooth playability, great for a wide variety of bass styles. 50 to 105 Medium strings have a higher tension, affording increased low-end response and output, and are ideal for all genres. The D'Addario 50 to 105 Medium Long Scale Bass Guitars Strings Set includes 4 strings, tuned G, D, A, and E.Dial It In, Crank It OutXL Nickel Wound, D'Addario's most popular guitar strings, are precision wound with nickel-plated steel onto a carefully drawn, hexagonally shaped, high carbon steel core. The result strings with long-lasting, distinctive, bright tones and excellent intonation are ideal for the widest variety of guitars and musical styles.Round Wound StringsRound wound strings have the feel and tone that most players are familiar with. This string construction combines the strength of the steel core with the tonal properties of the wrap wire alloy.String Winding TechnologyString winding equipment is designed and built by D'Addario's engineering team, guaranteeing a production range of 500000 to 800000 strings per day. Digitally- controlled string winding machines ensure productivity, accuracy, and consistency.Hex Core ConstructionPrecision-drawn hexagonal core was pioneered by D'Addario. This innovation allows the wrap wire to grip the core for superior dimensional stability, enhanced durability, and precise intonation.Wire DrawingD'Addario's in-house wire drawing machines produce musical instrument wire to exact specifications. Control over materials, equipment, and quality allows delivering of high-performance products.