The smoothest, cleanest, and most consistent Parker ball pen refill ever.;Fits all Parker ballpoint pens and any pen taking the Parker-style ballpoint refill.;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.