shapes
thingiverse
In Tinkercad, I designed various shapes which are ideal for holding circuits; however, they have multiple applications. For the pyramid shape, I suggest using a Replicator 2 for printing, while the other design is compatible with any 3D printer.
Download Model from thingiverse
With this file you will be able to print shapes 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 shapes.