It's a remix of ATtechdeals display stand.

It works great with smaller game cartridge like Gameboy, Gameboy Color, Sega Gamegear and so forth.

I reduced the width of the model to accomodate for those cart (from around 70mm to 40mm) and made the holder hole a little bit wider (from 1.8mm to around 2.4mm) to accomodate the way the cartridge are built (the PCB is on the back of the cart instead of the middle of it).