Smooth and dustless, these fluorescent chalk markers from Marvy Uchida are a must-have in your stationery supplies. You can use them on glass, metal boards and other non-porous surfaces. Details: Includes assorted colors 3 mm fine point Water based Nontoxic and fade-resistant AP Certified Conforms to ASTM D-4236 For indoor and outdoor use Contents: White Fluorescent Violet Fluorescent Orange Fluorescent Red