Chalk Brights White Liquid Chalk Markers are broadline markers with reversible tips for either thick or thin lines. They are water based, non-toxic, and wet erase. Clean with water to easily change up your art! Great on all non-porous surfaces. Includes two markers. For ages 3+. Conforms to ASTM-D4236 & EN-71. Contains water, resin, and titanium dioxide (TiO2).