Filament Dry Box Pass Through with Quick Fit Coupler

I built a dry box, using most of the parts found from here

https://www.thingiverse.com/thing:961881

The PTFE tube I had didn't hold into the pass through very well, so I modified the BUM_DRY_BOX_6003_pass_through_v1.STL file to add the ability to screw in a Pneumatic Air Straight Quick Fitting 4mm thread M6 fitting.

I purchased the fittings from here

https://www.amazon.com/gp/product/B01MQYJ9T6/ref=oh_aui_detailpage_o04_s01?ie=UTF8&psc=1

and they fit the new pass through nicely. The picture shows two of the new pass through pieces with the older version with a cap in the middle.