Fisher Space Pen Medium 1.1 mm Blue Refill – SPR1 in a blister pack

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The Fisher Space Pen offers refills from the PR (Pressurized Refill) series—designed for writing in conditions where ordinary refills simply fail. The SPR1 model, with a line width of 1.1 mm and blue ink, is a practical choice for everyday use and extreme situations.

Pressurized Cartridge – Writes Where Others Can't

The thixotropic ink is hermetically sealed in a pressurized reservoir. An internal separator separates the ink from the pressurized nitrogen, ensuring reliable writing under all conditions.

It writes underwater, at any angle, and at temperatures ranging from -35°C to 121°C
The ball is made of tungsten carbide—an extremely hard material
Cartridge life: over 3,600 meters of writing (depending on the surface and writing style)
It lasts three times longer than a standard cartridge
Exceptionally long lifespan—over 100 years

Compatibility and Package Contents

The refill fits all Fisher Space Pen pens, except for the Q4 model. The set includes a white adapter that extends the refill by 2.5 cm, making it compatible with Parker pens and similar models.

Magazine length: 8.9 cm
Cap length: 2.5 cm
Line thickness: 1.1 mm
Ink Color: Blue
It is available in various colors and line widths (thin and bold)

Specifications	Value
Brand	Fisher Space Pen
Model	SPR1
Series	PR (Pressurized Refill)
Line thickness	1.1 mm
Ink Color	Blue
Magazine Length	8.9 cm
Cap Length	2.5 cm
Ball Material	Tungsten carbide
Ink Type	Thixotropic, under pressure
Temperature range	-35°C to 121°C
Writing Resource	over 3,600 m
Contents of the Set	Refill and white adapter for Parker

Frequently Asked Questions

What makes the Fisher Space Pen SPR1 refill different from a regular refill?

The SPR1 refill uses thixotropic ink enclosed in a hermetically sealed, pressurized reservoir. An internal separator keeps the ink separate from the nitrogen, allowing it to write under conditions that are impossible for standard refills. It writes underwater, at any angle, and at extreme temperatures ranging from -35°C to 121°C. The tip is made of tungsten carbide—one of the hardest materials. Its lifespan is three times longer than that of a standard refill.

How long does the Fisher Space Pen SPR1 refill last?

The SPR1 refill writes over 3,600 meters, depending on the surface and writing style. That’s three times more than a standard refill. In addition, the manufacturer states that the ink retains its quality for over 100 years. This makes it an excellent choice for long-term use.

For which chemicals is the SPR1 cartridge suitable?

The SPR1 refill is compatible with all Fisher Space Pen ink cartridges, except for the Q4 model. The set includes a 2.5 cm white adapter that allows the refill to be used in Parker pens and similar models of the same size. The adapter extends the refill so that it fits properly.

Can the pen write in extreme temperatures?

Yes. The SPR1 cartridge is designed to operate at temperatures ranging from -35°C to 121°C. This makes it suitable for use in extreme cold or high temperatures. The pressurized system ensures a constant ink flow regardless of environmental conditions.

What are the dimensions of the Fisher Space Pen SPR1 refill?

The barrel is 8.9 cm long, and the cap is 2.5 cm long. The line width is 1.1 mm, which corresponds to a medium line width. These dimensions ensure a comfortable grip and precise writing for everyday use.

Is the refill available in different ink colors?

Yes, the Fisher Space Pen PR series is available in a variety of ink colors and line widths—fine and bold. The specific SPR1 model described here features blue ink and a 1.1 mm line width. For a different color or line width, check out the available options at Dulotec.COM.

Why is the cartridge ball made of tungsten carbide?

Tungsten carbide is an extremely hard, wear-resistant material. Thanks to it, the ball maintains its writing precision for a long time and does not deform even with intensive use. It is precisely this hardness that ensures reliable writing in all weather conditions and on all surfaces.

Original price was: 10,00 €.Current price is: 9,00 €.

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SKU: d-06-15-353 Categories: Ballpoint Pen Refills, Gifts for men, Luxury Pens

Description

Specifications	Value
Brand	Fisher Space Pen
Model	SPR1
Series	PR (Pressurized Refill)
Line thickness	1.1 mm
Ink Color	Blue
Magazine Length	8.9 cm
Cap Length	2.5 cm
Ball Material	Tungsten carbide
Ink Type	Thixotropic, under pressure
Temperature range	-35°C to 121°C
Writing Resource	over 3,600 m
Contents of the Set	Refill and white adapter for Parker

Additional information

Weight	0,01 kg

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About brand

The Space Pen—also known as the Zero Gravity Pen—is a pen that, thanks to its patented sealed pressurized ink cartridge, will write under almost any conditions (underwater and at extreme temperatures) and on almost any surface (greasy or wet paper and at any angle). These pens were first used in 1968 on the Apollo 7 mission. Since then, the Fisher Space Pen has been part of every NASA manned spaceflight. The products have also been used by the Russian and Chinese space programs! The Space Pen—a product that works under virtually any conditions. Whether upside down or floating in zero gravity, it doesn’t matter—these pens will get the job done. Write anytime, anywhere!