12 Invisible Ink Pens & 4 UV Lights Assorted UltraViolet Blacklight Markers Blue Red Yellow

Useful for the whole family. These UV ink markers are completely invisible in normal lighting, but illuminate incredibly bright under UV blacklight. Use these ink markers to implement security procedures, secretly mark your valuables, write hidden messages, artistic application, or just for plain fun with the kids. Each marker is full of our special blend of UV ink, so you get long lasting UV special effects.