Ernie Ball Primo Slinky, Set of strings for electric guitar, Gauges: .009.5"", .012"", .016"", .024"", .034"", .044"", Nickel-plated steel winding wire, Hexagonal steel core, Plain strings made of tin-plated carbon steel, This combination of gauges is ideal for guitarists who are looking for easier playability with minimal changes in sound and tension., Made in USA