These are miniature bases for tabletop war games. Includes a radiation symbol, a biohazard symbol, and a skull-and-crossbones.
Print at 1:1 scale.
30mm bases drawn with 4mm base height + 1mm symbol height. 30mm_s_r bases drawn with 4mm base height and the symbols are recessed 1mm. Choose your print settings as you see fit with these parameters in mind.
Let me know if there are any issues with these files and I will update if needed. I'm still building my RepRap.