1 pen = 2 highlighters. With their 2 highlighter tips, Fluo Duo pens allow you to switch from one colour to another in no time at all. Colours include orange and yellow. High quality finish on all types of paper, and will even work on inkjet prints. They will not dry out even if the cap is not put back on immediately (up to 4 hours). Comfortable ergonomic grip. The chisel tip allows you to draw thin or thick lines, from 1 to 5mm.