Rotring Isograph Technical Drawing Pen-0.18mm

Features: 
Isograph allows working in exquisite detail, offering a unique precision.
• Innovative push-on sleeve made for easy access to the ink helix and fast cleaning
• Thin stainless steel nib for the highest precision ever and a very long usage
• Refillable ink reservoir
• Available in 13 different line widths
To use on a variety of surfaces such as lineboard, tracing paper or vellum drawing paper.

The isograph features a refillable ink reservoir, and a patented push-on sleeve gives easy access to the ink helix for cleaning, even when the ink reservoir is full. Line widths for drawing as per ISO 128 and DIN 15, and for lettering per ISO 3098/1 and DIN 6676