This Design uses the Githubiverse Template by Gary Hodgson https://github.com/garyhodgson/githubiverse-template
You can see and download this design is a easy to navigate webpage generated by Githubiverse View the Githubiverse page and all the files here - http://richrap.github.io/Bee_House_Design/
I have various holes in my house brickwork and have noticed small to tiny bees using them.
Tanya Weaver http://www.girlmeetsbee.blogspot.co.uk/ mentioned these are solitary bees, and make homes in all sorts of places, this was my attempt to give them a nice place to live.
It could do with a rain cover and maybe the entrance pointing 20 degrees down.
Design by RichRap - www.richrap.com
Print with Hexagon Infill and stop at whatever height you like before the top prints Giving you a nice little house for bees.
Experiment with different levels of infill but around 8% to 20% seem to give a good size.
You can print many and at different heights, their is a middle section and you could print ones to go all around it.