Be!Board B3000 Glass board Marker / pen for whiteboards and magnetic boards, round tip 2-3 mm, black, non-permanent, dry wipe (set of 4) : Amazon.co.uk: Stationery & Office Supplies
WHITE NON-PERMANENT MARKER WINDOW MIRROR GLASS LIQUID CHALK WIPE OFF PAINT TIP | eBay
Amazon.com : 8 Pack Chalk Marker Pen & Dry Erase Markers with Reversible Bullet & Chisel Tip Fluorescent Markers Highlighters for LED Menu Board Bistro Boards Art Glass Window Blackboard Whiteboard :
Best Erasable Glass Markers [Windows, Plastic, Mirrors] – BrushWarriors