REGULAR SLINKY 5-STRING NICKEL WOUND ELECTRIC BASS STRINGS - 45-130 GAUGE Ernie Ball Nickel Wound Electric Bass Strings are made from nickel plated steel wrapped around a hex shaped steel core wire. Each bass guitar string produces a bright, balanced tone and is manufactured with the finest and freshest raw materials in the beautiful Coachella Valley of Southern California. Gauges .045, .065, .080, .100 .130