Stacking HAT for Raspberry Pi
Connect up to five HATs to your Raspberry Pi at once with this convenient Stacking HAT from PMD Way. Example of use:
Each board includes a 20cm GPIO cable, 2x20 inline header pins and supports. You need to be sure that there are not pin conflicts between the various HATs being used.
You can change pin allocations on the rear by soldering or cutting PCB jumpers.