Chalkzies Liquid Chalk Marker &bull; Premium Quality &bull; 3mm Fine Point &bull; Chisel/Bullet Reversible Tip (1-Pack, White) 3mm Liquid Chalk Marker (1-Pack, White) Reversible Chisel/Bullet Tip - 100% Water Based - Odorless - Erases with Water - Dust Free - Non-Toxic - Eco Friendly For Use On: Chalkboard Decals, Windows, Plastic, Metal, Ceramics, Glass, Whiteboards and other Non-Porous Surfaces Conforms to ASTM D-4236 & En71. Suitable for Children 3 Years and Above. WARNING: Not For Use On Porous Surfaces, Such As Chalkboard Paint, Painted Wood, Etc. - Please Test On A Small Area First!