This is a listing for one 3d printed, stainless steel, keychain locator with two embedded (non-removable) tritium isotopes, 3x22.5mm vials.
These lanterns are used as a keychain accessory (finding your keys in the dark) and also a fun conversation piece!
Brightest color is green (100%), followed by ice-blue, white and yellow (80%). Next is blue (60%), pink and orange (40%). 
The tritium vials are resin embedded within the steel body and NOT designed to be removable unless damaged, for replacement. If you want another color combination, message me and I will tell you if I have it in stock.

Size 38mm x 15mm, Weight 14gr. 

Tritium (symbol T or 3H, also known as hydrogen-3) is a radioactive isotope of hydrogen and one of the most valuable substances on earth, with a market price of 30.000$ per gram.
The Tritium vials used are light sources of gaseous tritium isotope, hermetically sealed in glass.
This radioactive tritium gas, glows completely on its own in a very safe manner, without needing to be 'charged' with light as required by most phosphorescent glow in the dark products. The glow will be subtle and visible in low-light conditions; the darker the better. It will not be visible in daylight or well-lit areas. The light produced is literally ''on'' at all times, it's intensity isn't reduced after a few hours and will last non-stop for about 20 years. This is truly a ''nuclear powered'' gadget!

NOTE: This is NOT a flashlight and cannot be used as such!

Worldwide international shipping, signed-for. Delivery takes 1-5 weeks (1-2 weeks for Europe/ 2-5 weeks rest of the world).