Adi Trading Invisible Ink Magic Pen with UV Light Multi-function Pen(Pack of 3)

The pen is made of plastic and the pen' ink is made of special high-brightness compounds that are invisible to the naked eye, but magically illuminate when exposed to the attached ultraviolet (UV) light. When your secret messages, codes, diagrams, etc. Are written with this special UV pen they will be invisible to the naked eye. The message can only be seen under the light of our UV light.