Custom 4 round-wound string set for electric bass guitar from Nickel Wound Electric Slinky Bass series that delivers maximum clarity and punch. Strings are made from nickel-plated steel (NPS) windings wrapped around tin-plated, hex-shaped steel core wire. Each bass string is manufactured with the finest and freshest raw materials for long life and maximum vibrance. Gauges: .045, .065, .080, .100.