P1P - PTFE Tube
The function of PTFE is to reduce resistance and guide filament. The tube's inner diameter is 2.5mm, and its outer diameter is 4mm.
In the Box
PTFE Tube - AMS internal (8pcs ):195mm*4, 230mm*4
To learn more about replacing the PTFE Tubes: https://wiki.bambulab.com/en/x1/maintenance/replace-ptfe-tube.