Specification:
Product name: BLACKWATER K36 Titanium Alloy Tritium Vials Light
Body material: TC4 Titanium Alloy
Light Range: 10meters
Self-luminous:25 years
Impact Resistant:2 meters
Waterproof: underwater about 100meters
Weight:10g
Color: red、blue、green、yellow、pink、orange、purple (please choose the color when ordering)
Size: 40mm x 10mm(length x body diameter)

Features:
1.It is a keychain fob specifically designed to hold a self-luminous tritium vial.
2.Tritium vials come in a variety of colors、 and will glow for many years without requiring any type of "charging" from sunlight.
3.The light never needs batteries、 and is really only visible as a glow in low light conditions inside about 30 feet. Pretty much its just a cool way to accessorize your stuff.
4.Great for EDC and easy to take、very suitable for decoration

Package included:
1 x BLACKWATER K36 Titanium Alloy Tritium Vials Light
1 x keychain
1 x Stainless steel chain