Get all 3 colors! You will get 3 Red, 3 Green, 3 Blue Glow-in-the-Dark vials. Each vial is 1.5mm x 6mm. When installing please use Loctite Threadlocker glue for the top threads of the ION pen cap to make sure there is a tight seal. After shining a bright light source on them they will glow for approx. 10 to 15 seconds before needing to be recharged.
PLEASE NOTE THESE ARE NOT TRITIUM VIALS. THESE ARE OUR STANDARD PLASTIC VIALS.