Fisher Space Pen PR Series Refill – Durable and Reliable

The Fisher Space Pen refill from the PR (Pressurized Refill) series is designed to write three times longer than a standard refill. Each cartridge provides over 3,600 meters of writing, depending on the surface and usage.

This model is compatible with all of the manufacturer's refills, with the exception of the Q4 model. The kit includes a white adapter that extends the refill by 2.5 cm, making it compatible with Parker refills and similar products.

Key Benefits of the Fisher Space Pen PR4 Refill

It lasts three times longer than a regular refill
It works underwater, at any angle, and at temperatures ranging from -35°C to +121°C
Tungsten carbide ball for maximum hardness and precision
Thixotropic ink, hermetically sealed in a pressurized container
An internal separator separates the ink from the pressurized nitrogen
Includes an adapter compatible with Parker chemicals
Available in a variety of colors and line thicknesses
Exceptionally long lifespan—over 100 years

Technical Specifications

Specifications	Value
Brand	Fisher Space Pen
Series	PR (Pressurized Refill)
Model	SPR4
Line thickness	1.1 mm
Ink Color	Black
Magazine Length	8.9 cm
Cap Length	2.5 cm
Ball Material	Tungsten carbide
Ink Type	Thixotropic, under pressure
Operating temperature	-35°C to +121°C
Writing Length	over 3,600 m
Cartridge Life	over 100 years
Contents of the Set	Refill and white adapter for Parker pens

Frequently Asked Questions

What makes the Fisher Space Pen PR4 refill so special?

The Fisher Space Pen PR4 refill uses thixotropic ink, hermetically sealed in a pressurized reservoir. An internal separator keeps the ink separate from the nitrogen that propels it. This allows for writing underwater, at any angle, and in extreme temperature conditions. The ball is made of tungsten carbide, which ensures exceptional durability and precision. The refill lasts over 100 years without drying out.

At what temperatures does the Fisher Space Pen PR4 refill work?

The Fisher Space Pen PR4 refill is designed to perform reliably at temperatures ranging from -35°C to +121°C. This makes it suitable for use in extreme conditions—from cold mountain environments to hot industrial settings. It is precisely this feature that sets it apart from standard ballpoint pens, whose ink freezes or leaks at extreme temperatures.

How many meters does the Fisher Space Pen PR4 refill write?

Each refill in the PR series provides over 3,600 meters of continuous writing. The actual length depends on the surface and writing style. That’s three times more than a standard refill. That’s exactly why the Fisher Space Pen PR4 refill is so popular among people who write a lot and don’t want to have to replace their refill often.

For which chemicals is the Fisher Space Pen PR4 refill suitable?

The Fisher Space Pen PR4 refill is compatible with all Fisher Space Pen pens, with the exception of the Q4 model. The set includes a white adapter that extends the refill by 2.5 cm. Thanks to this adapter, the refill also fits into Parker pens, as well as similar models from other brands. This makes it an exceptionally versatile choice.

Can you write underwater with the Fisher Space Pen PR4 refill?

Yes, the Fisher Space Pen PR4 is designed to write even underwater. The ink is hermetically sealed in a pressurized reservoir and is not affected by gravity or humidity. It can write at any angle—including upside down. This is especially useful in the field, in the rain, or in humid conditions.

What are the dimensions of the Fisher Space Pen PR4 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 size. The included adapter extends the refill by an additional 2.5 cm for compatibility with Parker pens. These dimensions make it suitable for a wide range of pens.

How long can the Fisher Space Pen PR4 refill be stored without use?

The Fisher Space Pen PR4 refill is designed to last over 100 years. The thixotropic ink is hermetically sealed in a pressurized reservoir, which prevents it from drying out even during long-term storage. It does not need to be stored in a specific position. It is precisely this feature that makes it exceptionally reliable for emergency situations, travel, and long-term use.

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

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SKU: d-06-15-354 Categories: Ballpoint Pen Refills, Gifts for men, Luxury Pens

Description

Specifications	Value
Brand	Fisher Space Pen
Series	PR (Pressurized Refill)
Model	SPR4
Line thickness	1.1 mm
Ink Color	Black
Magazine Length	8.9 cm
Cap Length	2.5 cm
Ball Material	Tungsten carbide
Ink Type	Thixotropic, under pressure
Operating temperature	-35°C to +121°C
Writing Length	over 3,600 m
Cartridge Life	over 100 years
Contents of the Set	Refill and white adapter for Parker pens

Additional information

Weight	0,02 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!