It's not my Design but, since it is uploaded, you can modify the scad-file to whatever Thread you need and the bowden is 6/4mm :)
Thanks for that! What's the inside diameter you use, 3 or 4 mm? It's work well? Is it possible to get them with M5 thread?
will definitely print it - but I want to use a metric (4mm/6mm) tube. hope it fits the appropriate festo coupling. thanks for sharing!