Airproof valve with filament filter for plastic box

Oct 14th. Loaded version2
The internal valve has been designed with a wider hole

These are two connectors to use in an plastic box to retain humidity out to keep the filaments in nice condition. The external part couples to a 6 mm pneumatic bowden valve. I ordered these from aliexpress http://tinyurl.com/yaln4pk8. Two M3-15mm screws with a round 5,4mm head (approximate) can be used to join the two parts together. In the interior piece, two hexagonal nylon 5,4mm nuts are used. I made a big sq