DirectGlow Brand Set of 4 Assorted Invisible UV Blacklight Ink Markers Blue Red Yellow

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! Each marker is full of our special blend of UV ink, so you get long lasting UV blacklight glowing effects. Each set includes 3 full sized ink markers. One in blue, red, and yellow. You also get one 3 section ink marker which combines all 3 colors in one marker. Simply pull or push to snap and unsnap each section write with your preferred color. WARNING- Ink formula designed and manufactured by DirectGlow LLC only. Markers purchased from other sellers on this product page may be of lower quality and not as pictured.