J-Adaptor To Pneufit 3/8"
This is remix from http://www.thingiverse.com/thing:324407
It an adaptor for 3/8" push fit connector.
I bought those by mistake the first time, and i never could find any proper adaptor for them.
Now there is one ;)
This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/73QdXHdl5f5