Pilot Frixion Highlighters have a unique design which allows you to highlight, erase and highlight again! Use the rubber tip on the end of the highlighter to erase the ink and you can re-write or highlight over the area right away. Each highlighter has a chisel nib so you can highlight in various line widths. Frixion Highlighters are perfect for highlighting important things in a book, document or diary, especially if you might need to erase it later. The ink is fluorescent to help emphasise important areas. Each highlighter's barrel colour matches the ink colour so you can easily find the right pen. This highlighter is green.