BASS STRING SET XL Series Round Wound Bright bass strings, Regular Light, long scale (032 - 045 - 065 - 080 - 100 - 130). D'Addario XL Nickel bass strings are world renowned as '' The Bassist's Choice '' whatever style it plays. XL strings are wound with great precision with nickel plated steel onto a hexagonal shaped core, resulting in strings with a distinctive, brilliant tone and excellent intonation. Nickel plated steel wire wound to the core is known for its distinctive bright tone and excellent tuning for all styles.