Fisher Space Pen Chrome Bullet 400CL – chrome-plated ballpoint pen with a clip

The Fisher Space Pen 400 Series is the brand's first model and remains its most sought-after product to this day. The 400CL model features a flawless chrome finish on a brass body—a combination that makes it both durable and elegant.

Every Fisher Space pen is precision-assembled and hand-tested. It comes with a lifetime warranty against manufacturing defects.

Features of the Fisher Space Pen 400CL

Length when unfolded: 13.3 cm
Length when folded: 9.5 cm
Weight: 19 g
Housing: chrome-plated brass
Finish: chrome
Mounting bracket: clip
Refill: SPR4 – black, medium line width
Compatible with all Fisher PR Series refills
Set with a plastic gift box

Writing Techniques

The refill contains a pressurized nitrogen gas cartridge. A small metal cylinder pushes the special thixotropic ink, which is hermetically sealed. Under normal conditions, the ink is solid—it liquefies only when writing.

The pen doesn't skip or leak. It writes up to three times longer than standard ink. The tip of the refill is a tungsten carbide ball.

Operates under extreme conditions

Temperature range: -34°C to +120°C
It writes underwater and in other liquids
He writes in zero gravity
It writes at any angle

Practicality and Wearability

Its compact size makes it easy to carry in a wallet or organizer. The clip secures it firmly to the edge of a pocket or backpack. It doesn't leak in the summer or freeze in the winter.

A Gift for a Man—and More

The Fisher Space Pen 400CL is a great gift for men and women in a variety of professions—doctors, lawyers, business leaders, military personnel, police officers, teachers, and many others. Its history and the technology behind it make it an excellent conversation starter.

History of the Fisher Space Pen

During the early NASA missions, astronauts wrote with pencils. For the Gemini program in 1965, NASA purchased 34 mechanical pencils for a total of $4,382.50—about $128.89 each. The expense caused public outrage.

Paul S. Fisher of Fisher Pen Co. developed a pen suitable for use in space without funding from NASA. The company invested approximately 1 million U.S. dollars of its own funds and subsequently patented the product.

In 1965, Fisher offered the pens to NASA. After rigorous testing, the agency approved the pens for use on the Apollo program missions in 1967. Approximately 400 pens were purchased at a price of $6 each.

In February 1969, the Soviet Union also purchased 100 Fisher ballpoint pens and 1,000 refills for the Soyuz spaceflights. Both American astronauts and Russian cosmonauts continue to use these pens.

Frequently Asked Questions

What makes the Fisher Space Pen 400CL different from an ordinary ballpoint pen?

The Fisher Space Pen 400CL uses a pressurized cartridge filled with thixotropic ink, hermetically sealed in a nitrogen-filled gas cartridge. The ink remains solid at rest and liquefies only when writing. The pen writes in zero gravity, underwater, at extreme temperatures ranging from -34°C to +120°C, and at any angle. Ordinary pens cannot function under any of these conditions. The tip is made of tungsten carbide—one of the hardest materials used in writing instruments.

What is the length of the Fisher Space Pen 400CL when retracted and extended?

When folded, the pen is 9.5 cm long, making it easy to carry in a wallet or pocket. When extended, it reaches 13.3 cm—a standard length for comfortable writing. It weighs only 19 g, so you can barely feel it.

What is the body of the Fisher Space Pen Chrome Bullet 400CL made of?

The body is made of chrome-plated brass. The brass provides strength and weight, while the chrome plating adds shine and wear resistance. The construction also includes steel components. The clip is an integral part of the design and allows the pen to be attached to a pocket, the edge of a notebook, or a backpack.

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

This model comes with an SPR4 refill in black with a medium line width. The pen is compatible with all Fisher PR series refills. Refills are easy to replace and are available in various colors and line widths. A single refill lasts up to three times longer than standard ink.

Is the Fisher Space Pen 400CL a good gift?

The Fisher Space Pen 400CL comes in a plastic gift box and is ready to give as a gift without any additional wrapping. It is suitable for men and women in various professions—doctors, lawyers, military personnel, business leaders, teachers, police officers, and high school seniors. The pen’s history, linked to the space programs of NASA and the USSR, makes it an interesting topic of conversation. It comes with a lifetime warranty against manufacturing defects.

Is it true that the Fisher Space Pen has been used by NASA and Russian cosmonauts?

Yes. The Fisher Space Pen was officially adopted by NASA for the Apollo program following rigorous testing conducted between 1965 and 1967. Approximately 400 pens were purchased at a price of $6 each. In February 1969, the Soviet Union purchased 100 Fisher pens and 1,000 refills for the Soyuz spaceflights. Both American astronauts and Russian cosmonauts continue to use them. The development was funded entirely by Fisher Pen Co. without any funding from NASA—the company invested about $1 million from its own resources.

What is the warranty for the Fisher Space Pen 400CL?

Every Fisher Space pen comes with a lifetime warranty against all manufacturing defects. Each model is precision-assembled and hand-tested before shipment. The warranty covers defects in materials and workmanship, but does not include normal wear and tear of the ink cartridge.