These are simple height guides that show the standard heights of Gridfinity modules. Gridfinity has a standard height unit of 7mm often denoted as 1u. Optionally a stacking lip may be added which also adds 4.4mm on to the height of the module. This is all in accordance with the specification provided here [https://gridfinity.xyz/specification/](https://gridfinity.xyz/specification/). Each guide has the height of a module without the stacking lip on the left side and with on the right. 

Each print profile contains multiple plates with with different combinations allowing you to print the full set of 4, set of 3,2 or the just the individual guides.

Please see examples below: