Rotring Rapidograph is the ultimate technical pen with pre-filled, disposable capillary cartridge - a completely new concept in technical pens! Virtually no maintenance needed..This new drawing pen that receives a clean, fresh breathing system with each new pre-filled cartridge. The ink reservoir and breathing system are in one piece. No leaking...The Rotring pen is the first drawing pen with a double-rotating breathing helix in the ink cartridge. As the diagram shows, the breathing helix of the new capillary system runs in one direction on the inside of the capillary cartridge and continues in the opposite direction on the outside. Instant ink flow... The technical design of the Rotring Rapidograph pen and specially formulated ink in the prefilled cartridge prevent ink from drying in the system. Available in 10 line widths from which to choose: 0.13, 0.18, 0.25, 0.30, 0.35, 0.50, 0.70, 1.00, 1.40 and 2.0. If you draw on drafting film you can still take advantage of the capillary cartridge drawing system by using the rapidograph F.This pen is fitted with a wear-resistant tungsten carbide point which effectively resists the abrasive surface of drafting film.
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