Inner dimensions are 55.5 and 18.5 mm. Will fit this model on the picture.
Screw mounted and adhesive mounted options available. The adhesive mount is on the picture. Used some mounting tape to secure it, holds really well.
I printed it on the prusa mk3s+ with layer height 0.2mm. I recommend a raft to prevent bed adhesion issues. I also used fuzzy skin to give it a “professional” finish. It looks great in my opinion.
The author marked this model as their own original creation.