Customizable Finger Stabilization – Easy Print Splint

I found out this thing is sold for 10 USD per piece, so i made a 3D model for everyone.
Good for finger joint stabilization.
I optimized this thing to be very easily sliceable and printable without supports.
This thing has 19 mm inner diameter. If you need different dimension, feel free to contact me.

EDIT 22. 5. 2020:
I remade the thing. It's now more angular from the outside, but more round on the inside. It is also prints with more bed contact. Hope you like bridges.

EDIT 6. 8. 2020
I added Fusion 360 archive file so anyone can remix this.