This gridfinity part is made to store this set of heat-set Insert tips:

[https://www.amazon.com/dp/B09VL41T7K?psc=1&ref=ppx_yo2ov_dt_b_product_details](https://www.amazon.com/dp/B09VL41T7K?psc=1&ref=ppx_yo2ov_dt_b_product_details)

It comes label with exact sizes for each tip. 

Feb 27th 2023 Update: I added a v4 version now that added a small ridge to prevent the longer flat piece from sliding up and into the square opening of the bin. I kept the original simply because I have not printed and tested the new version but I know the original works well already.