You have 2 different sizes of Panoramic Bite Blocks for Sirona Orthophos XG. It was tested in Serbia and Austria - and printed on Prusa i3 MK3S 3Dprinter.
This is the instagram of our firm so you could follow us if you would like (Or if you want us to make some models for you):
https://www.instagram.com/icr_studio_/?hl=en