Ten Years Usable Tritium Gas Fluorescence Keychains Support 100 Meters Underwate

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Meterial: Polycarbonate,tritium gas
Length: 42mm
Diameter: 10mm
This device which contains a small key ring fluorescent tube containing a small amount of gas - tritium (a radioactive isotope of hydrogen), the resulting fluorescence.
The visibility can be 30 feet about 10 meters. Caused by your attention.
Does not require batteries, which contains light-emitting material gas can be 10 years!
This fluorescence Keychain compared biggest advantage: You can use 100 meters underwater, you can use in harsh environments this thing is amazing, but do any harm.
Buckle on key backpack or mobilephone, night camping will not afraid can't find what you want!
When you change the metal ring to the necklace.It can absolutely be a cool hang adorn. In KTV, bars and discos, any place, only the dim glow on your body!!!
This product provides several colors for selecting: Blue, Orange Yellow and Red. Please write down your preferred choice at checkout.
Approved: CE / FCC
After sales service: 1 year warranty

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