Dedicated to creating a greener world and making a more affordable marker, AusPen makes refillable markers and ink in every color. Writing text, tables, graphs or drawing pictures on your whiteboard means using your marker regularly, and most people run out of black ink first. Black markers can be seen across the room, whether you are working in a small conference space or a large auditorium. Instead of switching to a less-visible color, simply refill your black marker with a few drops from this black refill ink bottle. One black refill ink bottle costs about as much as a three disposable markers, but can refill your AusPen markers up to 30 times. You will not only cut costs from your budget, but you will be saving hundreds of markers from ending up in landfills each year. Order your black refill ink today!Sold individually.