Description
3 boxes of Rotring Rapidograph Technical Pen Black ink cartridges (3 cartridges per pack = Total of 9 cartridges).
Rotring’s unique capillary cartridge
Innovative cartridge including the ‘ink helix’ system, so every time it is changed, the pen has a new, clean, helix and a new pressure equalization system for easy maintenance/operation.
Improved temperature stability through extra large ink-helix volume and optimum location of the ventilation opening for best reliability.
