This work-in-progress is a 1:1 scale model of a 1U CubeSat based on the CalPoly rev13 design spec.available at http://www.cubesat.org
The top and bottom can be glued on. I left a hole in one of the ends to simulate a camera port. One of the sides is cutaway to allow visibility to the interior of the satellite.
The brown panel in the cutaway side was a scrap from a previous design and not included in the STL file.