Why settle for an ordinary refills when you can have the same refills That have been used on every Space Shuttle mission, both USA and Russian. The only Ink cartridge that is not effected by gravity or the lack of, and in the vacuum space.

Take advantage of NASA Space Research

These are Fisher ink cartridges with adapters for use in Parker Pens, and are gas pressurized to 35 PSI. This means that it will not dry out like other pens and has a shelf life of over a hundred years. It does not rely on gravity so it writes upside down, in the vacuum of space, underwater, in the freezing cold of -30° F, and the boiling heat of 250° F. The precision fit Stainless Steel, tungsten-carbide ballpoint and socket keeps it leak free and writing longer, cleaner, and more consistently. Nothing else comes close. These are made by FISHER SPACE PEN in the USA. Sure you could buy ordinary refills, but why would you want to?

This listing is for TWO (2) Fisher Space Pens, Pressurized Ink Cartridge. Yes, these are the Zero Gravity, Writes up-side down refills, and they come with an adapter to fit Parker pens.