With the Tu-Bi-Co tool from Perlenpresse you can create tubes, bicones and cones. The good thing of this tool is, that the position of the brass plate can be adjusted infinitely. So you can self define the length, the diameter of the beads and the diameter of the mandrels.

Possible tube diameter from 3 mm to +/-40 mm
Possible tube length up to 100mm
It can be used mandrel in the thickness of 1mm to 6mm