Chalk Markers for Chalkboard by ChalkArt (5 mm Reversible bullet & chisel Tip) - Erasable Dustless Water-Based Non-Toxic Liquid Wet Erase Pens- ONLY SUITABLE FOR NON POROUS SURFACES ChalkArt is an Amazon registered brand. Be sure you are buying from an authorized seller. bright color liquid chalk marker. PROFESSIONAL QUALITY INK: We use the finest ink from Japan that dries in seconds. It doesn't easily smudge once it is dried but can easily be erased with a clean and damp cloth. ULTRA VERSATILE: Experience the freedom to write on any non-porous surfaces such as chalkboards, plastic, metal, glass, vinyl, and slate. ERASE EASILY: Wipes away cleanly from non-porous surfaces with a damp cloth. CAUTION: Does not work with chalkboard paint. Not all surfaces are non-porous. Always test first. EXTRA DURABLE REVERSIBLE TIPS: While other brands of markers have tips that fray easily, ChalkArt high-density reversible marker tips are built for professional use. Our REVERSIBLE TIP allows you to write in fine and bold lines - just flip the tip over to switch between bold and chisel tips. NON-TOXIC, ODOR AND DUST-FREE: Odorless, washable ink is amazing for indoor and outdoor use. It's also perfect for kids. chalkboards glass slate vinyl plastic metal