I love the Polymaker PolyDryer boxes, but I wanted a way to securely connect the 4mm PTFE tube to the box, so I made this model. The adapter is chamfered on the inside to gently guide the filament to the coupler. It can be installed on either outlet.

Print settings:

• Material: PETG. PLA will work too, but it's not as temperature-resistant as PETG.
• Layer height: 0.1mm. I also got good results with 0.2mm if you want a faster print, but I prefer 0.1 when printing threads.
• Orientation: both parts flat on the print plate.