Kaweco Classic Sport Rollerball Pen - NavyThe Kaweco Sport was first designed in 1911 as a pocket fountain pen which could be carried everywhere. It has an octagonal design and an oversized cap. Today, the Kaweco Sport range includes fountain pens, rollerball pens, ballpoint pens and mechanical pencils. Kaweco Sport rollerball pens measure only 10. 5 cm when closed, but when the cap is mounted on top of the barrel they become a 13 cm long, standard sized pen. Supplied with black ink.