I could't find any PTFE plug that would suit my needs so I made my own. 

6mm version is compatible with Polymaker Polydryer, so you don't have to remove the PTFE tube to keep it sealed and have filament ready.

Must be printed using TPU. I used eSUN eTPU-95A-175 with very good results and absolutely no stringing. 

There are 2 types included:

1. Version for 6mm PTFE tube, which works well together with Polymaker (Polydryer) dry boxes and retains filament. 
2. Version for standard 4mm PTFE tube with 2mm inner diameter, which due to too small size does not contain the retainer. 

Due to very tight tolerances, please make sure you have your printer and filament settings calibrated spot on. Any possible stringing, tolerance issues etc. are unfortunately only avoidable at your end and I cannot do any more on my side to make it any easier for you. 

I recommend using Orca Slicer as it has much better options for making functional prints with super tight tolerances. Also take the print profile as a base guide line and feel free to adapt it to your printer's optimal settings. 

Check out more of my designs and hit follow so you won't miss any upcoming functional models! 

I aim to upload at least one original, practical model every week. Stay tuned! 😊