Titanium Alloy Tritium Tube Keychain Self-luminous 25years 3.5x25mm

  The outer shell is made of titanium alloy CNC machined, and a real tritium gas light-emitting tube is embedded inside, which can emit light by itself (visible at night or in dark places). It is not luminous, but real tritium gas light-emitting, which does not require any energy and has a luminous life of up to 25 years.Color classification: purple, pink, red, yellow, white, green, ice blue, orange, purple blue, titanium alloy shell (excluding tritium tube)