The superior quality rotring isograph pen is the ultimate technical pen with refillable ink reservoir - its patented push on sleeve makes for easy access to the ink helix for fast cleaning and refilling Specially made for use on tracing paper, vellum drawing paper, lineboard and technical drawings Available in choice of nib with pen and replacement nibs from 0,1 to 1mm, drawing ink in bottle and cartridges in red, blue and black as well as cleaning concentrate Please see store for full range
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