This is the assembled version of the Pi T-Cobbler Plus.  It only works with the Raspberry Pi Model Zero, A+, B+, Pi 2,Pi 3, Pi 4! Or just any Pi with 2x20 connector. The Raspberry Pi B+ and Pi 2 has landed on the Maker World like a 40-GPIO...

You got a Raspberry Pi Model B+ that you want to have work with some old kit or plate or breakout or something and it uses the classic 26-pinout. Very frustrating, it is...unless you have this ingenious 'downgrade' GPIO cable. It has a 40-pin socket...