Loosly inspired by Alian and Dead Space.
Designed to fit a flat tritium vial 1.5x3x9mm.
Shapeways only produces the rings. you'll need to source the tritium. I've provided vial size info in the description of the rings. Please educate yourself on the potential health risks of tritium and the import restrictions for your respective country. May I sugest http://www.physics.isu.edu/radinf/tritium.htm Thanks for your interest -Jarvis