About this 3D model

I used this thing to connect a bottle to a rod for building a windowfarm. The bottle contains the plant pot. A picture is here http://farm6.staticflickr.com/5531/9210101347_e4b426219b_z.jpg All sources can be found here: https://github.com/schub/basteln/tree/master/windowfarm A how to for building a windowfarm can be found here: https://github.com/schub/basteln/wiki/Windowfarm