Dri-Mark® UV Security Marking System

Use "invisible" writing and UV light to identify your valuables — without leaving a noticeable trace on whatever you're marking! Mark any hard surface with this helpful security marker, which leaves your writing undetectable until seen under ultraviolet (UV) light. Use it to identify your property or equipment, such as a laptop or cell phone. Makes positive ID of recovered possessions a snap! UV light included for detecting security markings.