●Blocked bullet tip, line width approx. 2mm - prevents the tip from being pressed into the shaft. ●Dry safe and can be wiped clean without leaving any residue from whiteboards and surfaces such as glass and porcelain, quick drying, xylene and toluene free ink, aeroplane safe. ●Dry Safe: can be left open for days without drying out (test standard ISO 554) - extremely reliable. ●Polypropylene barrel and cap guarantee long service life, no ink evaporation, easy to refill, Made in Germany ●4 colours (red, blue, green, black) in the stable, standable Staedtler box.