Ernie Ball's Hybrid Slinky Hybrid Slinky electric strings are perfect for those who like the ability to combine Super and Regular Slinkys. These strings are precision manufactured to the highest standards and most exacting specifications to ensure consistency, optimum performance and long life. Hybrid Slinky wound strings are made from nickel-plated steel wire wound around a hexagonal-shaped core steel wire. Unwound strings are made from specially hardened and tin-plated high-carbon steel, producing a balanced tone for your guitar. Caliber .009,.011,.016,.026,.026,.036,.046