Staedtler's pigment black ink pen flow evenly for arts, crafts, sketching and drawing. They are archival quality, fade-resistant and acid-free with a long metal tip that is ideal for use with rulers and templates. These pens come in a handy, reusable wallet and in multiple line widths (0.05/0.1/0.2/0.3/0.4/0.5/0.6/0.7/0.8/1.0/1.2/0.3-2.0mm). The ink is DRY SAFE which means that the pen can be left uncapped for days without drying up (ISO 554). The pens are airplane-safe and the automatic pressure equalisation prevents the pens from leaking on board aircraft.