After seeing Lowend Lobster have to switch his brands (old company closed) and picked SIT, I tried them out on a bass. Now I've got them on two 4 strings and a 5 string bass. I've got two packs of strings sitting on the side as well that I got cheap on Amazon sale. My other two current basses are fretless so I've got Labella flats on the unlined and Labella tapes on my current project - finishing defretting & modifying a P bass :)