this is a case for a raspberry pi 3 b+. It has mounting holes for a buck converter to power the raspberry pi from the 3d. There are mounting points to mount a t slot mount to mount the case to any printer using aluminum extrusion. There is also a mount for a 4010 fan to cool the raspberry pi. this is the buck converter that i used https://www.amazon.com/Zixtec-LM2596-Converter-Module-1-25V-30V/dp/B07VVXF7YX/ref=sr_1_4?crid=3P5IBJTLA29H4&keywords=buck%2Bconverter&qid=1695579991&sprefix=buck%2Bcon%2Caps%2C134&sr=8-4&th=1
The author marked this model as their own original creation.