The magicians standard issue black Sharpie marker pen that has been converted to dry wipe ink!
You or your spectators can write with what looks like a normal permanent pen but you will be able to wipe it off on compatible surfaces.
We have put a small black Sharpie dot on the end of the grey barrel so you can tell it apart from a normal Sharpie.
No instructions provided this is an accessory / utility item.
