Fisher Space Pen 400PK – pink

The 400 Series was the first Fisher Space Pen model and remains their most popular product to this day. The pink Bullet pen has been part of the collection for decades – a vibrant, bold and playful colour combined with exceptional durability.

Whether you’re on the beach or in a boardroom, this pen is sure to turn heads. 🌸 You can even write with it upside down – it won’t stop.

Technical specifications of the Fisher Space Pen 400PK

Feature	Price
Brand	Fisher Space Pen
Model	400PK
Colour	Pink
Length when extended	13.6 cm
Length when folded	9.6 cm
Body	Rose-gold-plated brass
Tip	Tungsten carbide tip
Refill	SPR4 – black ink, medium tip
Compatibility	All Fisher PR refills
Operating temperature	-34°C to +120°C
Warranty	Lifetime warranty against manufacturing defects
Packaging	Plastic gift box

Why the Fisher Space Pen writes where others fail

Each pen is precision-assembled and hand-tested. The refill contains a pressurised nitrogen cartridge which forces out the special thixotropic ink – solid at rest, it liquefies when writing.

It writes underwater and in other liquids
It works in zero gravity and at any angle
Withstands temperatures from -34°C to +120°C
Does not leak or run out
Writes up to three times longer than standard ink
Compact – fits easily into a wallet or organiser
Clip for attaching to a pocket or rucksack

The perfect gift for men and women

Fisher Space Pens are practical, durable and a pleasure to use. They are suitable for teachers, doctors, lawyers, military personnel, police officers, business leaders and A-level students.

They also fit neatly in your car or everyday bag – they don’t leak in summer or freeze in winter.

The history of the Fisher Space Pen – from NASA to orbit

During the early NASA missions, astronauts used pencils to write. For the Gemini programme in 1965, 34 mechanical pencils were purchased at a total cost of $4,382.50 – a price that drew serious public criticism.

Paul S. Fisher of Fisher Pen Co. developed a pen that worked in space – without funding from NASA and using around $1 million of his own investment. He patented the product and offered it to the agency.

In 1967, following rigorous testing, NASA equipped the astronauts of the Apollo programme with these pens. Around 400 were purchased at a price of $6 each. In February 1969, the Soviet Union also purchased 100 Fisher pens and 1,000 refills for the Soyuz missions – previously, their cosmonauts had written with pencils.

To this day, American astronauts and Russian cosmonauts use Fisher pens in orbit.

Frequently Asked Questions

Can the Fisher Space Pen 400PK write underwater?

Yes, the Fisher Space Pen 400PK writes underwater and in other liquids. The pen uses a pressurised nitrogen cartridge, which forces the special thixotropic ink to flow even on a completely wet surface. This makes it useful in marine and mountain environments, where paper is damp or soaked.

At what temperatures does the Fisher Space Pen 400PK work?

The pen operates reliably at temperatures ranging from -34°C to +120°C. The ink does not freeze in the cold or run in the heat. This feature makes it suitable for outdoor use – in winter and summer – without the risk of failure.

What type of refill does the Fisher Space Pen 400PK use, and can it be replaced?

The pen comes with an SPR4 refill – black ink with a medium line width. The refill is replaceable and is compatible with all Fisher Space Pen PR refills. When the ink runs out, there’s no need to buy a new pen – simply replace the refill.

How long does the ink in the Fisher Space Pen 400PK last compared to a standard pen?

The Fisher Space Pen refill writes up to three times longer than standard ink. The thixotropic ink is hermetically sealed and does not dry out. The pen does not skip or leak, which means the ink is only used when you’re actually writing.

What is the warranty on the Fisher Space Pen 400PK?

The Fisher Space Pen 400PK comes with a lifetime guarantee against all manufacturing defects. Each pen is precision-assembled and hand-tested before leaving the factory. This warranty covers the pen’s body and mechanism.

Is the Fisher Space Pen 400PK suitable as a gift?

Yes, the pen comes in a plastic gift box, making it ready to give as a present. The pink colour is vibrant and eye-catching. It is suitable for teachers, doctors, lawyers, military personnel, police officers and business leaders – anyone who appreciates a practical and unusual gift with a story behind it.

Did astronauts use the Fisher Space Pen in space?

Yes. Following rigorous testing, NASA equipped the astronauts of the Apollo programme with Fisher Space Pens from 1967. Around 400 pens were purchased at a price of $6 each. In February 1969, the Soviet Union also purchased 100 pens and 1,000 refills for the Soyuz missions. To this day, astronauts and cosmonauts continue to use these pens in orbit.