Ernie Ball Power Slinky Bass Strings have been a top choice for players of all types since the early 1960s. Made from nickel plated steel (NPS) windings wrapped around tin plated, hex shaped steel core wire, Slinkys produce a well-balanced, all-around great sound, no matter what your playing style is. With a consistent sound, great value, reliable performance, and long life, they are round-wound for maximum clarity and serious punch. Gauges: 0.055, 0.075, 0.090, 0.110. Perfect for standard and drop tuning.