The Ernie Ball Ultra Slinky 10-48 Nickel Wound electric guitar strings 3-pack features individually sealed sets for lasting protection and better storage. These packs provide a convenient, cost-effective solution if you are buying multiple sets at the same time, while still ensuring each set stays as fresh as possible. Ultra Slinky Nickel Wound strings are made from nickel-plated steel wire wrapped around tin-plated hex shaped steel core wire. The plain strings are made of specially tempered tin-plated high carbon steel, producing a well-balanced tone for your guitar. Ernie Ball strings have been the premier choice for musicians around the world for over 60 years.