STAEDTLER Highlighter guarantees smudge-proof marking on all standard papers. It has the brightest ink to ensure that anything you highlight stands out and pops out of the page. Each Highlighter has an Ultra-soft chisel tip approx. 1 – 4 mm. It is ideal for highlighting words, phrases, blocks of text, locations on maps, clauses in documents and many more. This ink is fast drying and PP barrel and cap guarantee long service life. The Highlighter is Airplane-safe – automatic pressure equalization prevents pen from leaking on board aircraft. It’s available with Yellow colour ink in this pack.