IsoGraph Technical Pen - High precision technical pen with refillable ink reservoir, in 13 line widths.
- Wear-resistant, hard chrome-plated thin tip allows working in exquisite detail
- Refillable ink reservoir ideal for frequent drawers using bottle inks
- Patented push-on sleeve for easy access to the ink helix and for fast cleaning
- Ink level is clearly visible
- Ink bottle not included
- Can be used on a variety of surfaces such as lineboard, tracing paper or vellum drawing paper