Le Pen Flex – pens with a smooth, flexible brush tip that are particularly easy to handle. By gently controlling the pressure, you can easily draw plastic lines of varying thickness with these pens. Perfect for artistic fonts, calligraphy (especially for writing postcards, invitations, greetings), as well as for creatively decorating notebooks, planners, and journals. Le Pen Flex pens are filled with acid-free, non-toxic water-based ink. Number of colors: 6. Number of pens in the set: 6 pieces. For convenient storage of the pens – a sturdy and practical plastic case.