Thomastik Spirocore Spirocore Double Bass Strings, Medium, orchestra tuning Set. Last set! Medium Tension These are standard jazz strings, but I think they can also be used for brass band and other genres. ※ The strings themselves are all brand new and unused. However, only the outer bag of the G string has been opened once for confirmation. Also selling on other apps. Please note that they may sell out depending on the timing. Double bass Wood bass Double bass strings