This 2x20 header can be soldered onto a circuit board so you can easily connect a 40-pin ribbon cable directly from the Raspberry Pi. This header is also great for soldering onto a Raspberry Pi Zero so you can then put pHATs and other addon boards onto it.
Connect your own Raspberry Pi addon board with this custom-made extra-tall 2x20 header. The female header part has extra spaces to make it 13.5mm tall. When placed on your Pi, a PCB/HAT will fall over the Ethernet and USB port.
This 2x20 box header can be soldered on a circuit board so you can easily plug a 40-pin ribbon cable directly from your Raspberry Pi onto your project, for example.
This 10cm long ribbon cable has a 40-way male and a female header connector. Use this cable when using a HAT or other board that doesn't fit in a case, while keeping the Raspberry Pi safely in its case.