Pilot"s Vboard Master whiteboard markers let you get your message across and be positive with the planet. VBoard markers are made from 91% recycled materials, and may be refilled up to 4 times for continued use - that"s 4 times the use you get from conventional whiteboard markers. VBoard markers deliver vivid, dense writing clearly visible from a distance. And you can see the status on your long-lasting ink supply through the ink view window in the marker. VBoards use a newly developed Twin Pipe Feed (TPF) system that provides consistent color intensity from your first word to the last. Markers meet ISO 14001 and 14021 standards.