Specification:
Product name: 2x12mm Tritium Tube Necklace
Waterproof: 100m
Material: Tritium gas
light range:7-8cm
Color: green
Weight:5g
Size: 2 x 12mm

Features:
Glows continuously for 15 years
Bright and visible unique clear white glow
Completely contained and self-powered
Great gift to firends and family.

Package included:
1 x 2x12mm Tritium Tube Necklace