GHS Electric Bass 4 String Contact Core Super Steels 34" Scale, .045 - .105, M5200star rating 5AdrianNovember 6, 2009Use these on my Thunderbird, great sound and long lasting, this string design gives the Thunderbird a more contemporary, cleaner brighter sound than a typical Gibson 'hard rock only' bass; I have tried all the rest, Rotosound comes close but not as bright or long lasting; these are a keeper.