Ernie Ball Regular Slinky Round Wound Bass 5 Strings are heavily used by both amateurs and professional musicians. 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. Ernie Ball Regular Slinky Round Wound Bass 5 Strings Features at a Glance: Type: Bass, 5-string .045, .065, .080, .100, .130 Round wound Tin-plated hex steel core Nickel-plated steel wrap Ernie Ball Round Wound Bass strings give you solid tone and playability!