I have constructed a filament feedthrough for my Raise3D printer. This makes it possible to connect external filament boxes to the printer and feed the filament directly through the cover of the printer.

I reused the Teflon tubing that came with the printer and ran it through a Yotino fitting connector (see link below).

https://www.amazon.de/gp/product/B078SLGZ42/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

The Yotino fitting connector has a M10x1 thread.

Raise3D

Pro2

No

No

0.200

50