ChalkMarkers NEON, line width 2 - 5 mm, one each in white, yellow, neon pink, neon orange, neon green, light blue, 6 pieces. Intense, bright colour, good opacity, ideal for use on glass boards and chalk boards. Water based chalk ink, wetwipe, can be used on all non-porous surfaces such as glass, perspex, plastic and metals. Shake before use until you can hear mixing balls. Open cap and pump until tip is moistened.