15mm Chalk Ink
Great size for large surfaces and creating bold lines. Chalk Ink® Wet Wipe Markers write like a paint pen but dry to look just like chalk without the dusty mess traditional chalk leaves behind. Quick drying and smear-proof once dry; you can easily layer with other colors to create whatever designs you can imagine. Safe for use on a variety of non-porous surfaces, including chalkboards, chalkboard paint, glass, mirrors, windows, metal, and plastic. To clean, simply wipe away with a cloth and a little bit of water.