Nautex carbon tubes are used on Vendée Globe sailboats, including that of Yannick Bestaven aboard Maitre Coq currently leading the race!
Manufactured using the technology of draping on mandrel pre-impregnated carbon fiber or glass fiber and epoxy resin fabrics, they are cooked in a high pressure autoclave.
Several options are possible: constant thickness or tube with variable section, internal diameter 10 to 160mm, conical, with insert, sleeved, carbon / Kevlar, large choice of colors, … the tubes are made to measure and on demand .
https://services.cloud4.sbg.meosis.fr/nautex-international/en/carbon-tube.html
