Ernie Ball 2223 Nickel Super Slinky Pink Electric Guitar Strings 3 Pack 2223 Nickel Super Slinky Pink Electric Guitar Strings 3 Pack Three-pack of Ernie Ball 2223 Nickel Super Slinky electric guitar strings Gauges 9-11-16-24w-32-42 Nickels are the most popular of the Ernie Ball Slinky guitar strings They're made from nickel-plated steel wire wrapped around tin-plated hex-shaped steel core wire