<img src="https://wiki.factorio.com/images/Stone_brick.png"/>-based numeric font for carving into <img src="https://wiki.factorio.com/images/Concrete.png"/><img src="https://wiki.factorio.com/images/Hazard_concrete.png"/><img src="https://wiki.factorio.com/images/Refined_concrete.png"/><img src="https://wiki.factorio.com/images/Refined_hazard_concrete.png"/>
A-F included since hexadecimal is God's own numeral system.