Just print it, let it cool down and try to take out the middle part.

• Print-Settings:
• 2 Perimeters and minimum 5% Infill → If you want more, go higher. 

If you like you can try out my other difficulties of Tolerance Tests here: https://www.printables.com/de/@MrB_961158

I bet you can't get them all to work !!!

1. 0.05mm → Difficulty: Ultra Hard
2. 0.1mm → Difficulty: Very Hard   
3. 0.15mm → Difficulty: Hard
4. 0.2mm → Difficulty: Normal 
5. 0.25mm → Difficulty: Easy 
6. 0.3mm → Difficulty: Very Easy