Sharpie 37003 Ultra-Fine Permanent Marker, Marks on Paper and Plastic, Resist Fading and Water, AP Certified, Blue Color, Pack of 12 Proudly permanent ink marks on paper, plastic, metal, and most other surfaces Intensely brilliant colors create eye-popping, vibrant impressions and mark fluoresces under black light Remarkably resilient ink dries quickly and resists both fading and water; AP certified Endlessly versatile ultra-fine point is perfect for countless uses in the classroom, office, home, and beyond Colorful options: Includes 12 Blue Sharpie permanent markers