Chisel Tip Highlighter Deli highlighters are ideal for school, office or home to highlight text on paper, photocopies and carbon copies. Their bright fluorescent and non-toxic ink ensure excellent highlighting and marking. Depending on the angle at which the pen is held, you can get three line widths 1mm, 2mm and 5mm. Deli highlighters feature a large reservoir and a cap with a pocket clip. The PP barrel and cal will give you a long service life.