Description
This pen has a rotring capillary cartridge, a pressure-equalization system, and a ink helix. This means that you never need to clean the pen's ink helix and top reliability is guaranteed.
The rapidograph uses rotring's unique capillary cartridge. The pressure-equalization system, including ink helix is part of the ink cartridge which ensures that every time you change the cartridge, you get a clean new ink helix. This means that you never need to clean the ink helix and top reliability is guaranteed.
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