These Edding 360 Drywipe Markers can be used on most non-porous surfaces including enamel, glass and melamine. The low odour ink is quick drying, light resistant and wipes clean easily. The marker can also be left uncapped for up to 3 days without drying out. The bold bullet tip writes a 1.5 - 3.0mm line width. This bulk pack contains 50 markers with black ink.