Ernie Ball Stainless Steel Slinky Electric Bass Strings are made from stainless steel wire wrapped around tin plated hex shaped steel core wire. These strings provide a brighter tone and longer string life due to stainless steels inherent anti-corrosive properties. Gauges .040, .060, .070, .095. Features: Stainless steel slinky electric bass strings Made from stainless steel wire wrapped around tin plated hex shaped steel core wire Strings provide brighter tone and longer string life