Invisible Ink Ball Pen, Uv Ball Pen, Spy Ball Pen, Cute Office Gifts.

Invisible ink ball pen with UV light or call spy ball pen, can detect money also.

Written message invisible, except active build-in UV light to read. Message will be keeping secretly without to being find out. Great and fun gifts for young, kids and office.

Made by ABS or brass material , 4pcs AG3 button cells included. Each invisible ink ball pen with blister packing for easy selling. Instruction printing on the back of blister card.

Logo printing on each ball pen is available also.