A modified version of an earlier existing model for a cover for the XBOX Series X/S controller sticks.
This is just a "cover" for the stick, designed to cover the plastic part when the rubber top has fallen off. And it often happens if you play for a long time ;)
As the title suggests, the model was designed for TPU or similar rubbery material, in order to have the best sensations with your thumbs.
Ah yes, and also to put it up, otherwise it is impossible to mount the lever.
The author marked this model as their own original creation.