Diana Mod 75 sealing ring replacement

Custom Diana Mod 75 sealing ring replacement.

Tested with:
- Diana Mod 75

**If you like my designs and don't mind I would be happy about a beer. (Tip Designer)**

v4:
- No changes since release

**Additional requirements**
* None

**Printing**
- Layer height: 0.1-0.2 mm
- Support: no (not needed!)
- Infill: 100%
- Brim: yes
- Material: TPU (preferred)

**Assembly**
After printing remove the brim material and make sure the little hole is clean/empty.