set of 3 pens The Pilot Parallel is a major breakthrough in calligraphy pen design. The "Parallel" nib consists of two parallel plates, allowing the writer to create much sharper lines than with other calligraphy pens. It can also create gradated colors by transferring ink from one pen nib to another, allowing two different ink colors to then be used from one pen nib Each pen box contains a Parallel Pen, 2 ink cartridges, tools to clean and flush the nib, instructions, and care guide.