Nite Glowring - Glow in the dark - Tritium - Science Toys & Gifts – S.T.E.M. Store of Canada
TEC Accessories Isotope PRE (Picatinny Rail Edition) Glow in The Dark Keychain, Titanium Housing for 2 Glass Tritium Vial (Not Included) - Tritium Keychain Fob, Edc Key Accessories, Cool Keychain at Amazon