Fineliner for writing, sketching and drawing. Cap off feature - the pens can be left uncapped for 18 hours without drying out (Test ISO 554). Long metal tip, ideal for use with rulers, templates (e.g. 572 FL). Pigment ink, indelible (in accordance with ISO 14145-2). Lightfast and waterproof ink. Erasable when used on tracing paper, no bleeding when highlighted. High-quality, sturdy metal clip. Polypropylene barrel guarantees long service life.