About this 3D model
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