Octagon PIP
thingiverse
It seems like I've seen other things like this. But I couldn't find the model. So I whipped this up in Tinkercad. Enjoy
Download Model from thingiverse
With this file you will be able to print Octagon PIP with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Octagon PIP.