The Ernie Ball SUPER SLINKY ELECTRIC BASS Roundwound String Set - 45-65-80-100. The most popular Ernie Ball bass strings, produce well balanced all around good, punchy sound. The Ernie Ball SUPER SLINKY ELECTRIC BASS strings are made from nickel plated steel wire wrapped around tin plated hex shaped steel core wire. By far the most popular Ernie Ball bass strings, produce well balanced all around good, punchy sound. Ernie Ball is the pioneer of rock and roll guitar strings. Setting the standard for the industry has enabled Slinky strings to become the world's top selling brand. Jimmy Page, Eric Clapton, Steve Vai, and Slash are among the long list of Slinky players.