Rotring Isograph Pens are instruments created for engineers and architects, manufactured and designed with precision for optimum performance. Isograph pens offer Rotring's exclusive technology in select line widths in compliance with ISO standards. Rotring Isograph Technical Pen College Set - 0.25 mm, 0.35 mm, 0.5 mm, Set of 3.

• 3 pen set of high precision technical pens with refillable ink reservoirs is perfect for College level students
• Wear resistant, hard chrome plated thin tip allows exquisite detail work. Nib is crafted from stainless steel
• Push on sleeve provides easy access to ink helix and fast cleaning. Color coded barrel indicates line width
• Refillable ink reservoir is ideal for frequent drawers. Fill from ink bottles available in multiple colors. Ink not included
• Wear resistant, hard chrome plated thin tip allows exquisite detail work. Nib is crafted from stainless steel. Not for any use on skin, including tattoos