Sold as 1 Dozen. Highlighters feature a tank-style barrel with long-lasting ink supply. Bright, see-through fluorescent inks. Chisel tip for precise marking. The non-toxic ink is ideal for marking documents. Safety Data Sheet. Fluorescent blue ink. You can even leave the cap off for up to a week without drying it out. This pack comes in a pack of dozen. AP certified non-toxic; ACMI approved.