Pi GPIO Plus Reference Board and 20 Male to Female Jumper Wires for The Raspberry Pi A+, B+, 2, 3 and 3B+ Raspberry Pi GPIO Plus reference pinout board only 0.8mm thick 20 male to female jumper wires, 20cm in length Compatible with Raspberry Pi Models A+, B+, 2, 3 and 3B+ Idiot proof, really! You can't put it on backwards Combo pack one Pi GPIO Plus reference pinout card and twenty male to female jumper wires