Designed to hang on Flash Forge Creator Pro Handles.
They are stack-able as seen in the pictures.
This is a simple print. You can really turn up the speed and let her rip. I had my Hictop Prusa I3 going over a 100mm/s.
I did try to print one at .4 mm layer height and it did not get good layer adhesion. The item cracked and can be seen in the picture.
Prints great in any material.