GPIO Reference Board for the Raspberry Pi Model A+, B+, 2, 3 (2 pack) If you have the RPi model 3B+ then "these are not the boards you're looking for" select another option above Compatible with Raspberry Pi Model A+, B+, 2 and 3 (not 3B+) Only 0.8mm thick Idiot proof, really! You cant put it on backwards Two pack of the Raspberry Pi GPIO Plus reference pinout card (also available in a 10 and 25 packs)