Non-tapered tops. I suspect the ones I mentioned might be from either late model Alpina or Mk7 Pursang because there are sliders of both types in with the tubes. I mentioned the positioning of the knurling because there are also some tubes there that are otherwise the same but with the knurling further down which I think might be Sherpa T, and because I don't know how far apart the triple clamps are on Pursangs.