D6 Futuristic Square Gears Dice - Numbers

This dice may be a potential component in one of our games.
Measurement: 18mm x 18mm x 18mm
We've yet to print these thingies, let us know if there's issues with the print.
We made 4 different versions:
1) Square Futuristic Intruding Numbers
2) Square Futuristic Extruding Numbers
3) Square Robotic Intruding Numbers
4) Square Robotic Extruding Numbers