Ernie Ball's Extra Slinky Blue electric guitar strings are made from nickel-plated steel wire wrapped around a tin-plated hex-shaped steel core wire. They offer a great balanced sound that's neither bright nor too dark. Ernie Ball Extra Slinky Blue Electric Guitar Strings Features at a Glance: - Type: Electric, 6-string - .008, .011, .014, .024, .030, .038 - Balanced sound - Tin-plated hex steel core - Nickel-plated steel wrap Ernie Ball nickel wound strings make your electric guitar sound and play great!