Brand: Ernie Ball String Gauge: Custom Color: Hybrid (45-105) Instrument: Bass Guitar String Material Type: Nickel Coating Description: Coated Ernie Ball Bass Slinky strings are favored by legendary bands worldwide, including Tool, Rage Against the Machine, Zac Brown Band, Green Day, and Avenged Sevenfold. The Hybrid Slinky 45-105 gauge is one of the most popular gauges for 4-string basses. Rich and balanced tone. Made in the USA with tin-plated high-carbon steel core wire and nickel-plated steel wrap wire. Sealed packaging ensures the strings stay fresh from the day they are made.