Porsche design Slim Line P3125 fountain pen, comes with sophisticated, distinctive design. The pen's cap and barrel had the same diameter. Therefore the cap posting during writing is not permited. The fountain pen fitted with 18K gold nib, spring loaded clip and equipped with converter to refill ink from ink bottle. You may also replace the converter with standard size ink cartridge while travelling with the fountain pen. The fountain pen is presented in the Porsche Design black pen box.