Set of Four (4): Blacklight Invisible Ink Pens. UV Marker, Secret Message Pen. LED Pen with UV Light Security Marker. UV Ink Toy Pens for Drawing and Writing with Ultraviolet Ink. Pen with Emergency Light. Marker for Practical Jokes. Stocking Stuffers.
Set of 4 invisible ink pens with UV lights.  Batteries installed & replacement batteries included.