Swing Bass Stainless Steel Roundwound Bass Guitar Strings. The most popular Roundwound bass string ever! Rotosound was the first string company to produce this kind of string. Introduced in 1962 it changed the sound of the instrument instantly. The favorite string of many players including Billy Sheehan, John Paul Jones and Geddy Lee. The steel used to produce these strings is unique, combined with a highly secretive manufacturing process.With a legacy that stretches back to the birth of Rock n' Roll itself, Rotosound have been manufacturing the world's finest music strings for more than 50 years. They have an endorsee list that spans half a century and reads like the Who's Who of modern contemporary music. They are proud to include innovators such as Jimi Hendrix and John Entwistle plus modern day legends like Steve Harris, Billy Sheehan and Duff McKagan as players who have chosen to play Rotosound Strings during the course of their musical careers. 5-String set. Extra Long Scale fits 33.5" to 36" Scale Basses. Gauges 45-65-85-105-130.