Fibre-tip pens with cap ring STABILO Cappi display featuring a case of 12 with 12 pens each. The barrel is made of polypropylene and is colored to match the writing ink. These pens have a bullet tip and use water-based, washable ink. They can be left open for several days without drying out, and the caps can be threaded onto a clever ring. The unusual tube shape prevents the pen from rolling away, and they feature an ergonomic grip zone and a ventilated cap. The pens can be stored open for up to 24 hours and have a line width of 1 mm. The writing colors of the pens are assorted. They are CE certified. The pack design includes 12 cases of 12 pens, which comes with one cap ring.