Review on Micro Connectors Aluminum Raspberry Pi 3 Model B B+ Case With Fan And Heatsinks - Blue (RAS-PCS04-BL) by Karen Robinson

These 1-2 GPIO Expansion Boards (RAS-GP02) come in handy when you stack components and end up stacking with a HAT that has no pins. Or maybe you just can't access it from the top of the stack. The only problem is that they come with completely unprotected pins. So you have to play the "pin lottery" and hope nobody gets lost. I recommend packing them with other bulky but soft items like clothes so they all ship in one box. You don't need a simple soft envelope or email program.