Rotring Rapidograph Ink Refill, Black
Well-known among technical drafters, engineers and line artists, Rotring ink cartridges feature an innovative ink helix design giving you a new clean helix after each replacement and a novel pressure equalization system for easy maintenance. Ink can be used down to the last drop. Each pack contains three cartridges. Fast drying and waterproof - can be used on a variety of surfaces such as lineboard, tracing or vellum drawing paper. Made in Germany. Not for any use on skin, including tattoos.