Cartridges keep ink contained so replacing it is a clean process, and are fitted with ink reserves ready to be released with a tap when pen is low. Washable ink lays down smoothly, dries fast and won"t smear. Ballpoint pens are convenient for daily use. Parker"s Quinkflow technology provides smoother, cleaner, more consistent writing performance. 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.