Titanium Alloy 25 Years Self-Illuminating Tritium Trachea Keychain 36mm Length

Titanium Alloy 25 Years Self-Illuminating Tritium Trachea Keychain 36mm length Tritium tubes do not require any energy and can self-illuminate for about 25 years. The fluorescence of tritium gas is weak and cannot be observed during the day. In dark places, you can find it glowing. Titanium Alloy 25 Years Self-Illuminating Tritium Trachea Keychain 36mm length Internal tritium tube size: 3x22.5mm