Fineliner for writing, sketching, and drawing. Pigment ink, indelible (in accordance with ISO 12757-2), lightfast, and 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 (only black ink), with no bleeding when highlighted. Long metal tip, ideal for use with templates (from line width 0.1 mm) and rulers (from line width 0.2 mm), e.g., Mars 572 FL. PP barrel guarantees long service life. Airplane-safe - automatic pressure equalization prevents the pen from leaking on board aircraft. Available in stand-up STAEDTLER box.