IMAGE&reg; 8 Colors 3mm Highlighter Fluorescent Liquid Chalk Marker Pen for LED Writing Menu Board Glass Window Sign Chalkboard Ink, Dries fast like real chalk Fluorescent Markers Clean easily with a damp Cloth Can be used for decorating and writing on glass, windows, board and all non-porous surfaces. Works similar to other dry-erase markers, but is more fluid when being used and dries into bright colors that glow when backlit by a light source. Package Content: 1 box 8 colors 3mm Marker Pens (Yellow, Green, Red, Blue, White, Pink, Orange, and Purple)