12mm Counter Cube (for Gloomhaven HP)

This is a 12mm cube that I designed specifically to work with https://www.thingiverse.com/thing:2507046

When your Gloomhaven enemies have more than 12 hit points, 2 six-sided dice just won't cut it. What to do? __Just print this handy HP counter cube!__

Example: Place this cube with a 12 showing next to a six-sided die showing 3, and that enemy has 15 hp!

The sides show 12, 18, 24, 30, and 36, easy allowing you to track enemies with up to 42 hit points. The bottom has no number for ease