This handy 2x20 IDC Box Header is the matching connector for our 40-pin GPIO Cable. By soldering this onto perf board you can run a GPIO cable from your Pi A+/B+/Pi 2/Pi 3 and Pi 4 to the socket.

This is the same socket that comes with our Pi Cobbler Plus or Pi T-Cobbler Plus but without the PCBs or anything

This socket only works for the Raspberry Pi Model A+/B+/Pi 2/Pi 3/Pi 4 GPIO cables.  It does not work with the Raspberry Pi Model B GPIO cables. It is just the socket.