Give Your Promotion a Shot of Excitement with This Syringe Shape Pen! Click the Plunger to Use Pen & Retract It with the Tab on the Side. Black Ink. It is Filled with Varying Colored Liquid for Authentic Syringe Look. Includes Fluid Measurements on One Side. Great for Nursing Schools, Drug Companies, Doctor Offices, Hospitals, Medical Industries, Healthcare, & Much More! Its Medium-sized, 0.7mm Needle Tip Glides Around the Page with Ease, a Wonderful Promotional Product."