This is a 1x1x3U Gridfinity block that allows you to route cable through your Gridfinity storage solution.

Each cable router block is made up of two parts that snap together using the same 6x2 sized magnets that are used for the bottoms of Gridfinity bins. This model uses hexagonal holes which allow to pressure fit the magnets without using glue (for both attacking the two halves of the block to each other, and also to attach the block itself to the baseplate).

The top part has the usual Gridfinity stacking lip, so you can stack other containers on top of your cable router, essentially forming an “underground” cable routing solution.

I use this for my Gridfinitified night stand where I want to bring my phone charging cable to the front without it dangling over my other Gridfinity modules.