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: 0.045, 0.065, 0.085 0.105. Features: Made from stainless steel wire wrapped around tin plated hex shaped steel core wire Provide brighter tone and longer string life Stainless steels inherent anti-corrosive properties