Slinky Nickel 2221 REGULAR SLINKY 10-46 This is the absolute standard of electric strings, as well as the most popular Ernie Ball strings. Used by Eric Clapton, John Mayer and Steve Vai, these strings are particularly balanced and suitable for all styles. The spinning of low strings is in nickel-plated steel wound around a hexagonal steel core. Solid strings are made of high-endurance steel and nickel-plated carbon. An impressive selection of sizes is available in this range of 6, 7 and 8 strings. If you want to discover Ernie Ball, this is where you should begin.