Titanium Acrylic 4-in-1 Tritium Tracheal Keychain Self-Illuminating for 25 Years
Titanium Acrylic 4-in-1 Tritium Tracheal Keychain Self-Illuminating for 25 Years
The exterior is made of acrylic material and 4 tritium gas tubes are embedded inside. You can't see it glowing during the day. When it is dark, its brightness is very obvious. It is worth mentioning that it is tritium gas and can glow by itself for up to 25 years.
The exterior is made of acrylic material and 4 tritium gas tubes are embedded inside. You can't see it glowing during the day. When it is dark, its brightness is very obvious. It is worth mentioning that it is tritium gas and can glow by itself for up to 25 years.