Discover the Staedtle® pigment liners in black, perfect for writing, sketching, and drawing. This pack contains four assorted widths: 0.1mm, 0.3mm, 0.5mm, 0.7mm, offering you a variety of choices to suit your creative needs. With a long metal tip, these liners are suitable for use with rulers and templates. They feature indelible pigment ink that conforms to ISO 14145-2, and are lightfast, acid-free, waterproof and erasable on tracing paper. Plus, they can be left uncapped for up to 18 hours without drying up. Enjoy excellent reproducing capabilities and a new contemporary metal clip design. The PP barrel guarantees a long service life, while automatic pressure equalisation makes them aeroplane-safe. The pack even converts to a convenient desk set.