Since I didn't use them, I hope someone can make use of them. Features: Slightly thicker than the standard 50-105 gauge. For those who want a thicker sound. The XL Nickel Round Wound series is a world-renowned, classic electric bass string series, known as "The Player's Choice" by bass players of all genres and styles. Precisely manufactured with D'Addario's unique digital control equipment, each string produces excellent intonation and clear sound. Recommended for all bassists.