Quartet Premium Glass Dry-Erase Markers are optimized for use on contemporary, glass surface boards. Delivers strong bold color every time, to ensure that your message is distinct and legible. Create thick, broad lines that make your writing more easily seen and read by others. Perfect for communicating either up close or from a distance. Quickly move from one project to the next with these easy to erase markers. Don’t fuss with caked on ink. The smooth ink easily wipes away, leaving a streak-free, clean surface. Deliver unmatched color on glass boards with the free-flowing liquid ink system. Colors stay vivid and bold during the lifetime of the marker for continuous performance. Pack includes 12 black markers. Our see-through ink gauge shows exactly how much ink remains for your use. The non-toxic, low odor ink is perfect for use in classrooms, offices and homes.