Parker Quink Ink Refill Cartridge for 5th Technology Ink Pens, Medium Point, Black 12 Count, (S0959000) Innovative 5th technology combines the best aspects of fountain and roller pens and adjusts intuitively to your writing style in just a few words. Combines flexible tip and metal hood for an exceptionally smooth and fluid writing experience, with intense and sharp rendering. Exclusive refill for Parker Ingenuity pens. Designed to maximize cap-off time. Eliminates pressure, impact and temperature-induced ink leaks. Parker Quink inks are specially designed and formulated to the most exacting standards to ensure that Parker products deliver faultless performance. Limited warranty guarantees product for 2 years from date of original purchase against defects in materials or workmanship.