These unique parallel plate fountain pens by Pilot achieve more beautiful and sharper handwriting than existing calligraphy pens in the market. Each set comes with a Parallel pen, one black and one red ink cartridge, a pump to flush the pen, and a nib cleaner. Ink cartridges sold separately. In order to achieve gradation, two Parallel Pens are required. Available in 6 different nib sizes from 1.5mm to 6mm The single pens are supplied with 1 black cartridge, 1 red cartridge and a nib cleaner.Filling Mechanisms: Cartridge/Converter. Converter not included but is available in store. Fits the Pilot Con-40 converter). Also available in store is an assorted pack of cartridges. Colours included in the 12 assorted pack are pink, red, orange, yellow, light green, green, turquoise, blue, violet, sepia, blue-black and black (one of each).