POWER SLINKY NICKEL WOUND ELECTRIC BASS STRINGS - 55-110 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 .055, .075, .090, .110