Rotring Isograph Pen for tracing paper, vellum drawing paper and lineboard. The isograph has a refillable ink reservoir. Its patented push-on sleeve makes for easy access to the ink helix for fast cleaning.
Rotring Isograph Pen for tracing paper, vellum drawing paper and lineboard. The isograph has a refillable ink reservoir. Its patented push-on sleeve makes for easy access to the ink helix for fast cleaning.