Fisher Space Pen 400PP Purple Haze Bullet

The Fisher Space Pen 400 series is the brand’s first and most popular model. The 400PP Purple Haze pen takes its name from the purple stratospheric haze surrounding Titan – Saturn’s largest moon.

Gases and particles collide at an altitude of almost 560 km above Titan’s surface, creating the characteristic violet glow. It is this phenomenon that inspired the purple finish of this pen.

Construction and technology

The barrel is made of brass and steel with a purple finish. The tip of the refill is a tungsten carbide ball.

The ink is thixotropic – it is solid when at rest but liquefies when writing. The pen does not skip or leak.

It writes up to three times longer than standard ink
The refill contains a pressurised nitrogen cartridge
It works at extreme temperatures: -34°C to +120°C
It writes underwater, in zero gravity and at any angle
Precision-assembled and hand-tested
Lifetime guarantee against manufacturing defects

Dimensions and contents

Length when extended: 13.6 cm
Length when folded: 9.6 cm
Barrel: brass with purple finish
Refill: SPR4 – black ink, medium nib
Compatible with all Fisher PR refills
Includes a plastic gift box

Practical and compact for everyday use

The pen takes up very little space – it fits easily into a wallet or organiser. 🖊 The clip allows it to be attached to a pocket or rucksack.

It doesn’t leak in summer or freeze in winter – reliable in all conditions.

A gift for a man with character and a story

The Fisher Space Pen is a suitable, prestigious gift for men and women in various professions. 🎁 Ideal for teachers, doctors, lawyers, military personnel, police officers, business leaders and A-level students.

It’s a pleasure to use and makes for an excellent conversation starter thanks to its history and technology.

History of the Fisher Space Pen

During the early NASA missions, astronauts wrote with pencils. For the Project Gemini programme in 1965, 34 mechanical pencils were purchased at a total cost of $4,382.50 – around $129 each.

This expenditure caused public outcry, and NASA began to look for alternatives. At the same time, Paul S. Fisher of Fisher Pen Co. developed a ballpoint pen specifically designed for the space environment.

The new pressurised-cartridge pen worked in zero gravity, underwater and at extreme temperatures. The company invested around $1 million of its own funds, without any funding from NASA, and patented the product.

In 1965, Fisher offered the pens to NASA. Following rigorous testing, they were approved for the Apollo missions in 1967. Around 400 pens 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 spaceflights. To this day, American astronauts and Russian cosmonauts continue to use these pens.

Frequently Asked Questions

What is special about the ink in the Fisher Space Pen 400PP?

The ink is thixotropic – it is solid in its normal state and only liquefies when writing. This means that the pen does not leak or skip, even under unusual conditions. The cartridge contains a pressurised nitrogen cartridge that pushes the ink towards the tip. Thanks to this technology, the pen writes underwater, in zero gravity and at any angle. The ink lasts up to three times longer than standard ink.

At what temperatures does the Fisher Space Pen 400PP Purple Haze work?

The pen works reliably at temperatures ranging from -34°C to +120°C. This makes it suitable for use in extreme conditions – cold winters, hot summers or high-temperature warehouses. It does not freeze or leak, unlike standard pens. This is precisely why it is also suitable for keeping in your car or bag at all times.

What materials is the 400PP pen made of?

The pen’s body is made of brass and steel with a purple coating. The tip of the refill is a tungsten carbide ball – a material with high wear resistance. The construction is precision-assembled and hand-tested. The pen comes with a lifetime guarantee against manufacturing defects.

What type of refill does the Fisher Space Pen 400PP 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 the pen is compatible with all Fisher PR refills. This means you can choose a different ink colour or line width to suit your preferences. Changing the refill is quick and easy.

Is the Fisher Space Pen 400PP Purple Haze suitable as a gift?

The Fisher Space Pen is a practical and prestigious gift for men and women in a variety of professions. It is suitable for doctors, lawyers, military personnel, police officers, teachers, business leaders and school leavers. It comes in a plastic gift box, ready to give. Its history and the technology behind it make it an interesting topic of conversation. At Dulotec.COM, you’ll find this and other Fisher Space Pen models at a great price.

What is the history of the Fisher Space Pen and why do astronauts use it?

Paul S. Fisher developed the pen without funding from NASA, with the company investing around $1 million of its own funds. The aim was to create a pen that would work in zero gravity, underwater and at extreme temperatures. Following rigorous testing, NASA approved the pens for the Apollo missions in 1967. Around 400 were purchased at a price of $6 each. In 1969, the Soviet Union also purchased 100 Fisher pens for the Soyuz spaceflights. To this day, astronauts and cosmonauts continue to use this technology.

What are the dimensions of the Fisher Space Pen 400PP?

When extended, the pen is 13.6 cm long, and when retracted, 9.6 cm. Its compact size makes it convenient to carry in a wallet, organiser or bag. The clip allows it to be attached to the edge of a pocket or rucksack. Despite its small size, it is a fully-fledged pen with a long-lasting refill.