Deuterium keychain 20x40 mm, 99.9%, D, hydrogen isotope

The keychain contains a high purity deuterium discharge ampoule 99.9%! Attention! Keychains do not light up by themselves! We use a Tesla coil to ionize the gas in the ampoule (glow)! The keychain is made of transparent urethane. The dimensions are 8x20x40 mm. It has a steel chain and a ring.