Fineliner for writing, sketching and drawing Pigment ink, indelible (in accordance with ISO 14145-2), lightfast, waterproof on paper. CAP OFF - can be left uncapped for at least 12 hours without drying up (only black ink). Erasable when used on drafting paper, no bleeding when high-lighted. Long metal tip, ideal for use with rulers and templates e.g. Mars 572 FL. PP barrel guarantees long service life. Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft. Available in stand-up STAEDTLER box.