This ultraviolet formula marks with invisible ink and cannot be seen until placed directly under a black light.
• Marks on plastic, glass, metal and other non-porous surfaces
• Removable water-based formula comes with a durable fiber tip and is safe on human skin
• Featuring Pump Action® Technology
• Ergonomic, non-slip, rubber Pro Grip®
• Handy pocket clip-on cap
• Multi-lingual packaging