The Rotring Isograph College Set is an excellent quality and durable collection of high-quality drawing instruments. The precision ink pens have a refillable ink reservoir and feature a crafted stainless steel nib, as well as a colour coded barrel indicating line width.
They are perfect for tracing paper, vellum drawing paper and lineboard. The set includes three isograph pens in sizes 0.25mm, 0.35mm and 0.5mm, as well as a bottle of ink (23ml), a Tikky mechanical pencil (complete with twelve 0.5mm leads), a B20 eraser and a compass attachment. This is an excellent value set for professionals that undertake extensive technical drawing tasks.
These are great to use and extremely easy to fill. filling them was the reason I've not bought these pens before, wish I'd bought them long before now!
Best range of pen sizes for a good basic set (.25, .35. & .50) and quality of Rotting equipment best in class. I bought my first set of Isographs in 1977 and these new pens are to replace my worn out originals.