Drawn from the upright bass, these bass guitar strings have an outer winding that is made of a special nickel alloy which gives it unsurpassed tone depth, an enhanced fundamental and a sound that is hard to find in any other string. The steel core is wrapped in a silk inlay which makes it very flexible with a depth of tone and high output. This makes the instrument the closest you can get to an upright double bass. The manufacturers of these strings are tuned in to the constantly changing musical world and apply their knowledge into the technique of building these strings, so you can trust that the Thomastik-Infeld strings are made with the highest quality. Technicians wind and check each string by hand in order to make sure that their tone and quality is 100 percent to your satisfaction. Please note that these are long scale strings at 34 inches.