edding 4095 Chalk Marker – White – 2 Chalk Pens – Round Tip 2-3 mm – Chalk Pen for Blackboard, Wipeable – for Writing on Windows, Glass, Mirrors – Blackboard Pen with Opaque Colours : Amazon.de: Home & Kitchen
Edding 90 Glass Pin Markers - For Writing On All Glass Surfaces - Non Permanent and Dry Wipe - Pack of 5 - Assorted Colours : Amazon.de: Stationery & Office Supplies
Amazon.com : Edding Window Markers Set of 10 Bullet Tip for Blackboard 2 - 3 mm White : Office Products
Amazon.com : edding 90 Glassboard Marker - Black - 1 Glass Pen - Round nib 2-3 mm - washable window Marker Pen - for Writing and marking on Glass surfaces such as windows and Glassboards - Dry-wipeable : Office Products
Amazon.com : Edding 4-4090049 Window Marker White : Office Products