Festool Systainer Mini Insert

This should be a press fit.

For bigger dividers see: https://www.prusaprinters.org/prints/123422-festool-systainer-mini-4-large-insert-dividers

Shell is minimum 1,2mm thick

Part number is counting from top left to right:
1-2-3-4-5
6-7-8-9-10
11-12-13-14-15