Artisan's Effect Chalk Markers Premium (6mm) 8 Pack Erasable vibrant liquid chalk colors for crafts chalkboards whiteboards and glass Use on windows, whiteboards, chalkboard stickers, chalkboard contact paper, glass, tile, plastic and met. Easily wipes off of with a damp cloth non-porous surfaces (test before use as some chalkboards may be painted and pour-us) No-odor with bright neon colors: yellow, green, red, blue, white, pink, orange and purple Unlike other markers these come with a reversible tip you have the option using a rounded or chisel Non-toxic -our liquid chalk window marker conforms to ASTM D4236 and EN-71 Artisans effect branded products comes with a 100% satisfaction