The first rollerball pen from Traveler's Company (a Midori sister company) combines comfort and portability into one clever design. Thanks to its long cap and short barrel, the pen is easily pocketable. It also features a massive brass eyelet, so it can be attached practically anywhere. Both the format and the design make this rollerball pen the ideal companion for your life on the go. The pen can be easily used with standard fountain pen cartridges.