The tube through which the filament passes from the extruder to the heat break, heat block, and nozzle is PTFE tube. This Teflon tube is super smooth and ensures that the filament is transported smoothly with minimal resistance.
We have PTFE tube in various colors, which you can order in multiple meters in one piece. To cut the tube to size, use the PTFE Tube Cutter.
With pneufits, you can attach the PTFE tube to the extruder and the hot-end.