Transforming Windows in Schools Chalk markers for bold designs, decorations and labelling on glass, windows, chalkboards and other non-porous surfaces. Water-based liquid chalk. Excellent opacity, even on dark and transparent surfaces. Pump system, shake before use, remove cap and pump.

• Stroke Width 4-15mm
• For use on glass, windows, chalkboards and other non-porous surfaces
• Excellent opacity, even on dark and transparent surfaces
• Wipes away with a damp cloth from virtually all non-porous surfaces
• Water-based liquid chalk with a neutral odour
• Set of 5 neon colours, 2x white, 1x yellow, pink and orange