SuperChalks White Liquid Chalk Marker Pens 4-Pack - 4mm Reversible Tip - ONLY SUITABLE FOR NON POROUS SURFACES IMPORTANT PLEASE READ - SuperChalks are designed to be used on NON-POROUS surfaces and are NOT SUITABLE FOR CHALKBOARDS! SuperChalks bright white liquid chalk marker (4mm Precision Tip) (Four Pack). The Liquid chalk in SuperChalks is completely dust free... Simply wipe with a damp cloth and watch as it disappears without the regular smudge and mess! Concentrated liquid prevents running and dripping. These markers are completely versatile. They can write on any surface... Mirror, glass and even metal. The only limit is your creativity! Create fantastic, eye-catching, attention grabbing displays! Dusty chalk is for amateurs, use liquid chalk for that professional edge. Protected by a free 60-day money back guarantee!