Both sets were used for a short time on a Yamaho TRBX 2 tuners per side, so these sets will NOT fit on a Fender or Fender style in line tuners as the g string will not be long enough. They will fit any 2 per side 34" scale bass (see photo)  with about 3 pole windings. Bass strings are fine but in the case of the Fenders I was looking for more old school flatwound sound. The GHS too are at least on the bass I used them just not what I was looking for . I will say they do feel good.  Silks on both sets are fine.