The Pilot Mixable Colour Cartridge is designed exclusively for the Pilot Parallel Pens. Inks can be mixed to create an infinite number of shades.
Each box contains 6 cartridges. The assorted colour box comes with 12 cartridges; one each of the following colours [pink, red, orange, yellow, light green, green, turquoise, blue, violet, sepia, blue black, black].