Ernie Ball Slinky Stainless Steel Wound Electric Guitar 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: 0.011, 0.014, 0.018p, 0.028, 0.038, 0.048.