Quartet premium glass board dry-erase markers with bullet tips create thick, broad lines that can be easily seen and read, even from a distance. Quickly move from one project to the next With these easy to erase markers. The smooth ink easily wipes away, leaving a streak-free, clean surface. The free-flowing liquid ink system delivers unmatched color on glass boards. Colors stay vivid and bold during the lifetime of the marker for continuous performance. A see-through ink gauge shows exactly how much ink remains for your use to determine when it's time to change the marker. 12 pack is available in assorted colors, including black, blue, Red and Green.