Specification:
Product name: Copper Brass Square Keychain Lantern
Material: Copper
Keychain size: 32mm x 8mm(length x width)
Weight: 8.4g
Tritium Vials Size: 3x22.5mm
Tritium Vials Color: green,blue,white,orange

Features:
1.It is a keychain fob specifically designed to hold a standard 3x22.5mm 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.

Package included:
1 x Copper Brass Square Keychain Lantern