Description A box of 12 Pilot Namiki Blue-Black fountain pen ink cartridges. Pilot Namiki fountain pen ink cartridges are proprietary, and only fit Pilot or Namiki fountain pens that accept cartridges. Having trouble deciding between colors? Use our Ink Comparison Tool to quickly and easily view different colors side by side.We offer Free Shipping on all orders over $50 for US customers, and for orders over $250 for our Canadian customers.