The College Isograph Set contains:
• 3 Isographers (0.20-0.40-0.60)
• 23ml black ink bottle
• Rotring Tikky 0.5 mechanical pencil
• Rotring Tikky 0.5 HB mechanical pencil leads
• Rotring eraser B20
Rotring (rOtring) is a former German manufacturing company of technical drawing tools and writing implements established in 1928 as a fountain pen manufacturer.
The name "Rotring" directly translates to "red ring" which is still placed around the barrel of their pens today.