Liquid Chalk Markers for Blackboard - Set of 10 Washable Chalk Pens for Chalkboard Signs Windows Glass Black Board-24 Chalkboard Labels Included - 6mm Reversible Tip - Walmart.com
8 Color Erasable Liquid Chalk Highlighter Fluorescent Neon Marker Pen LED Writing Board Glass Window Art - AliExpress
8 Colors/box Erasable Oblique Highlighter Pen Set 6mm Liquid Chalk Fluorescent Neon Marker LED Window Glassboard Pens - AliExpress