10 PACK CHALK MARKERS: High quality water-based chalk pens (non-toxic) with dustless rich colors;TWO TIP SIZES: Each chalk marker has a two-sided tip, simply pull out the tip and reverse it;WORK ON: Kassa Chalkboard Decal (Available on Amazon) and any nonporous surfaces (most chalkboards);WET WIPE MARKERS: Erase easily off non-porous surfaces. Great alternative to paint & chalk!;WARNING: Test the blackboard markers on a small surface, in order to ensure that they will erase