Replacement for Stabilo Caps Ring

My children use the Stabilo Cappi pens and with intensive use at school the ring breaks at some point.

Here is the replacement part printed in TPU. Feel free to add or subtract individual initials directly in the slicer. In the example shown, my daughter's initial.

Suitable for https://www.stabilo.com/de/filzstift-stabilo-cappi/on168-41