Fits for Parker ballpoint pens and any pen taking the same ballpoint refill Provides smoother, cleaner, more consistent writing performance This replacement refills let your pen can be repeated to use, extend the life of your favorite pen Good for writing, can be applied in the study, work, etc. Set include 6 pcs replacement refills, enough of your basic daily needs Specification: Length: approx. 10cm/3.94inch Tip Diameter: 0.7mm Available Color: blue, black Please tell us the color you want when you buy it, or else we will send it at random Package: 6 x Replacement Refills