This is a storage box for 2 bambu lab hotends with silicone sock, screw and thermal paste storage and a lid to keep dust out.
It is a remix to make it compatible with the excellent gridfinity with pin system which requires no magnets and clicks into place.
https://makerworld.com/en/models/440624#profileId-346300
The author remixed this model.
Cut the bottom from the gridfinity with pin box and added it onto the nozzle holder to make it compatible with the gridfinity with pin system