The Parallel Pen from Pilot is a true breakthrough in the classic art of calligraphy. Featuring a 1.5 mm nib consisting of two parallel plates, this pen produces sharper and crisper lines than other existing calligraphy pens. The Parallel Pen makes it easy to quickly swap ink cartridges so you can create gradated color lines or to mix colors. This advanced calligraphy pen set includes 2 ink cartridges (one black ink and one red ink), a converter to clean the pen and a nib cleaner. Other ink colors and nib sizes are available for purchase separately. Now you can take your calligraphy writing to a new level with the Pilot Parallel Pen. From thin lines to thick lines and from basic black ink to gradation of color, this unique calligraphy writing pen does it all!