Ernie Ball Slinky Flatwound Electric Guitar Strings combine the classic, roundwound Slinky tone, and effortless playability you love, with the beautifully smooth texture and reduced finger noise of a traditional flatwound. Wound with a patented cobalt alloy ribbon, the result is a set of strings perfect for any player looking to add an entirely new enhancement to their sonic arsenal. • MFSKU P02591 • UPC 749699117001