Marvy Uchida-Bistro Chalk Marker Fine Point Set. Non-toxic and fade resistant, they are perfect for outdoor use at the home, office or school. Use Bistro Chalk Markers on chalkboards, light boards, windows, windshields and other non-porous surfaces. They are opaque, water-based, pigmented and erasable when dry. This package contains four pastel colored pigment markers in orange, green, pink and purple. WARNING: Choking Hazard. Not suitable for children under 36 months. Conforms to ASTM D4236. Imported.