Box Breathing Keychain
thingiverse
Here is a keychain that can be used to remember box breathing or 4x4 breathing. It is great for grounding.
Download Model from thingiverse
With this file you will be able to print Box Breathing Keychain 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 Box Breathing Keychain.