DADDARIO / EXL115BT XL Nickel Round Wound Balanced Tension Medium. I purchased this in July 2023 from Sound House and have kept it unused. Below is the description from Sound House: DADDARIO's EXL115BT, a standard electric guitar string, is loved by guitarists around the world. The Balanced Tension Medium gauge. The bright sound of the orthodox nickel wound suits various playing styles. ■ Electric Guitar Strings ■ XL NICKEL ■ Nickel Round Wound ■ Balanced Tension Medium ■ .011, .015, .019, .028, .037, .050 ～D'Addario XL NICKEL～ DADDARIO's XL NICKEL series, a standard electric guitar string, is loved by guitarists around the world and continues to receive overwhelming support. The bright sound of the orthodox nickel wound suits various playing styles.