Apparently I, and Owen Burton, was wrong. Only 2 thicknesses of bars fitted. !9mm fitted to all cars. 20.6mm fitted to some estates and all commercials . The thicker bar could have been fitted to cars if a Heavy Duty Pack was fitted. Sorry about the misinformation.
The marina bars I fitted are only a few thou thicker than the minor ones but have a larger boss at each end giving it a shorter spring length by about 2". they needed over 20lb more to raise 1" copaired to the minor ones
