All Space pen refills are in stock and posted Recorded Delivery on the same or following working day.

Ordinary ball pens rely on gravity for ink flow, but with Fisher Space pen ballpoint refills being pressurized at nearly 35 pounds per square inch, ink is continuously fed to the tungsten carbide ball, allowing the user to write at any angle, even upside down.  This advancement required the development of a new special ink.  This new visco-elastic, thixotropic ink, flows as a result of the shearing action of the rolling ball in its socket.  The shearing action liquefies the solid gel thixotropic ink, allowing the Space pen to write smoothly and dependably on most surfaces and even underwater.  Evaporation, wasted ink and back leakage are eliminated.

Writes: from -30° F to 250° F ● on wet surfaces ● on photographs ● through grease ● underwater ● at any angle ● upside down

Fisher Space Pen Refills.

Available from the Penbox shop and online in blue, black and red in fine or medium.  £3.75

All prices include VAT.  Penbox also accept telephone orders and enquiries.