ZL--138D 0.7mm Injection Needle Style Invisible Ink Ballpoint Pen w/ Purple Light - Green + White
Color Grass Green + White Brand N/A Model ZL--138D Material ABS+PC Quantity 1 Piece Refill Color Others Writing Thickness 0.7mm Other Features This pen is very interesting. After you've written the handwriting is transparent. If you use LED light on the cap to shine on it you will see the words; Purple LED light can detect currency bill; Powered by 3 x AG3 batteries (included) Packing List 1 x Ball pen 2 x Refills