This is a PCB for breaking out the pins of the MicroSD Card. It is specifically designed for the red PN532 NFC module, but it can be used for anything.
SD cards are typically 0.75mm thick, but that is not a typical PCB thickness that is offered by the fab houses
The SD card sniffer I bought from Aliexpress was 1mm thick
I've ordered both 0.8mm and 1mm PCBs from JLC and both worked ok.
PN532 NFC reader - Aliexpress*
CERN Open Hardware Licence v1.2
Essentially, do whatever you want with it.