The product is a invisible ink pen, the ink will disappear after an hour you write, it also has money detect function.
## Product Description
100% brand new and high quality
Looks just like normal pen, but a great tool for magic trick.
The word that wrote down by this pen will disappear thoroughly within hours .
Make fun to your friend with this pen and good gift for your friends
* Magic Ball Pen Invisible Disappear Slowly Ink within hours X 1