Cover for vent pipe

-EDIT- I've taken the files to YouMagine.com since Makerbot has joined the dark side: http://www.openbeamusa.com/blog/2014/5/22/stay-classy-makerbot

https://www.youmagine.com/designs/cover-for-vent-pipe

I had this 'problem' with a little bird crawling around in the vent pipe, so I made a simple cover for it. It fits like a glove for a 8,5 cm diameter pipe :)

Easy to change dimensions in the OpenSCAD file.