You have to print it with an 0.25 mm Nozzle to get the details.
The uploaded g-code is for printing with two colors (white/black)
The Zipper I used in the Picture with the blue Pencilcase is also printed.
You can find it at:
https://www.prusaprinters.org/de/prints/122975-zipper
The author hasn't provided the model origin yet.