The Stipula Leonardo DaVinci Capless fountain pen uses a cartridge converter filling system that is compatible with standard international-size ink cartridges and converters. The pen comes with one converter (already installed in the pen) and one ink cartridge. The pen is packaged in the classic red Stipula pen box with information on the pen, the brand, and how to use Stipula fountain pens under the false bottom of the luxury pen box.