The Rotring Rapidograph technical pen has a prefilled, disposable, capillary ink cartridge which offers a significant improvement over other technical pens in the single most troublesome area — consistent ink flow.
Virtually no maintenance is required because the ink reservoir and the breathing system are one piece. This means that each time you replace the ink cartridge, the pen gets a complete new pressure equalization system, and you get instant ink flow without leaks or blobs until the cartridge is empty.
Each pen is fully equipped with one cartridge, a stainless steel drawing point, and a color-coded barrel and cap with double seal and clip. It's refillable with cartridges only.
™ Rotring is a trademark. ™ Rapidograph is a trademark.