The Ernie Ball Regular Slinky Flatwound Electric Bass Strings combine the smooth feel of traditional flats and the power of cobalt. Featuring a super bright cobalt ribbon wrap, cobalt under wraps and optimal hex-core to wrap ratio, the new Flatwound Bass strings are the first flat that actually feels like a flat and sounds like a round. Gauges .050 .070, .085, .105. Features: Combine the smooth feel of traditional flats and the power of cobalt Featuring a super bright cobalt ribbon wrap Cobalt underwraps and optimal hex-core to wrap ratio Feels like a flat and sounds like a roun