Inject some fun into your writing with these cool liquid filled syringe pens. It looks just like a syringe, and the pen extends every time you "make an injection." Play doctor and author at the same time!Features:    Realistic design, with liquid in the pen chamber    Set of 4 Retractable 5" ballpoint pens    Makes an excellent stocking stuffer     Excellent birthday gift for a doctor or medical student    Color of syringe pen does not indicate color of ink     All syringe pens write in black ink    Ages 5+