Tritium Vial Holder

See your keys in the dark!I designed this to hold a 3mm by 22.5mm tritium vial. I got it printed in grey steel by shapeways over 10 years ago and its still intact and glowing. There was a little interference that I had to clean up to fit the tritium vial but not bad. I put it next to my other Merkava Isotope Fob, that I love too.