You are buying a 3D printed case designed by CAMinventions for the MiSTer FPGA system.
Included in the fee is a Sunon 80mm fan that has been pre-wired to connect to GPIO pins 11 (Red = +5V) and 12 (Black = GND). When you assemble the case, please take care to route the wires neatly (they fit between the board and the case well), and the Red goes to pin 11.
As it is an ABS 3D printed case, the manufacturing process results in minor cosmetic flaws and imperfections wihch is normal. ABS has a tendency to warp at the corners, so this is pretty much unavoidable. Every case is checked by me before shipping, and you will receive photos before I ship, in case you have any questions about what you’re getting.
Stay tuned for some different designs in the future (CNC steel, wood and acrylic !)