Quartet 50014M EnduraGlide Dry Erase Marker, Chisel Tip, Red, Dozen Sold as 1 DZ. With their patented three-chamber, liquid-ink design, EnduraGlide dry-erase markers always deliver strong, bold color. Non-toxic, low-odor ink is safe and easy to use. All-purpose writing tool for large or small boards. See-through ink gauge shows exactly how much ink is left. Ideal for use on whiteboards and nonporous surfaces.