The highlighter is designed for use on all types of paper, including fax paper and copy machines. The chisel-shaped writing tip allows for varying line widths. The wide part of the tip is 5.2 mm, making it convenient for highlighting... text, while the fine part is 0.6 mm for underlining. The body color matches the ink color. Water-based fluorescent inks dry quickly after application and do not leave marks on the back of the paper due to the fine and even application. It has a recognizable patented shape and has become an absolute bestseller in the range of highlighters ErichKrause in more than fifty countries worldwide. Shelf life is 5 years. Maximum length of a continuous line is 660 m.