The file 'Gameboy Game Holder 3D Printer Model' is (stl) file type, size is 1.9KB.
A version of the3dcoder's "Gameboy Game Holder & Storage (Includes GB/GBA/3DS)" without the side section & it just being able to hold GB/GBA games in a vertical row.
Original: https://www.thingiverse.com/thing:3433343
