One #SPR4F Black Ink / Fine Point Ink Cartridge
This Listing is for ONE (1) New Fisher Space Pen
"SPR" Series Black Ink / Fine Point Refill
(#SPR4F) for a Fisher Space Pen. This refill was developed for NASA
and has been used on EVERY Space Shuttle mission both American and Russian.
They are hermetically sealed with a specially formulated thixotropic ink and
pressurized to about 35 PSI. They are the only refills that will
write at any angle because they do not rely on gravity, and have a shelf life
of 100 years. The bottom paragraph tells more about the Fisher story. The
SPR Refills come in a variety of colors and points. This pressurized refill
will write at any angle even upside down, freezing cold and blistering heat,
even under water. The SPR Series Refills fits all Fisher Pens except for
the Triple action or Quad action pens; they take the "SU"
Series. Each refills also come with an adapter so they will fit
Parker and Parker style Pens as well as the Fisher Pens. Just click on the
store icon on this listing and that will take you to our store. Then on
the left hand side of the page is a list of categories, Click on SPR Series
Refills to see them all. Often Imitated but never Duplicated.
Thank You From
Cyber Pen Sales