This print will hold the three eyepieces that come with the OneSky telescope. Try printing it in glow-in-the-dark! The holes in the hinges have been sized to fit a short piece of filament, so are no additional parts needed to complete the print. I have uploaded files both with and without the word "Eyepeices" in it so that it can be printed on a single-filament printer, or on a MMU printer.
The author hasn't provided the model origin yet.