A1 AMS Lite PTFE bowden holder tight fit
It is a 4 Tube bowden holder in tight fit variant to prevent sliding down, it has exactly the PTFE Tube outer diameter.
A loose fit variant is also available here:
A1 AMS Lite PTFE bowden holder loose fit by undi23 - MakerWorld
If you have any requests for changes or ideas, just let me know.