Arts Chalk Markers,FuzzyGreen 15mm Pen Highlighter Combo Fluorescent Liquid Chalk Marker for LED Writing Board Color:red,yellow,orange,pink,blue,green,purple,white Line width: 15mm;Package Include:8 x Marker Pen The Glitter Pens Markers can be used for decorating and writing on glass, windows, board and all non-porous surfaces. Known as liquid chalk, this dry erase marker is perfect for list makers, jotter-downers, family-corrallers, students, entrepreneurs of all types. Used on glass, windows, or dry erase boards, your sign will help convert pedestrians, menu collectors, and window shoppers into customers and clients