Are you often writing by hand? Then consider buying the liner, which can be used for drawing. Liner STABILO SENSOR F 4 pcs Case features water-based ink, which is also washable. It writes with a line thickness is 0,3 mm. Don't worry about the ink drying out. It's cap closure makes sure that your handy pen won't stop working.
Specifications can be changed without notice. Images are for illustrative purposes only.