Fisher Space Pen Cap-O-Matic with brass cap and red barrel, model 775G-R, in a gift box

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Fisher Space Pen Cap-O-Matic – a pen for every situation

The Fisher Space Pen Cap-O-Matic Model 775G-R is a pen with a brass cap and a red plastic barrel. It can be activated with one hand—quickly and conveniently.

This model is suitable for a wide range of users:

Law enforcement officers and military personnel
Firefighters and medical professionals
Construction workers, engineers, and outdoor workers
Anyone looking for reliability when writing

Space-proven technology

The Fisher Space Pen was developed without funding from NASA—the company invested about $1 million of its own funds. After rigorous testing, NASA equipped the astronauts on the Apollo mission with these pens in 1967.

In February 1969, the Soviet Union also purchased 100 units and 1,000 magazines for the Soyuz spaceflights. To this day, astronauts and cosmonauts rely on them.

Features of the Fisher Space Pen Cap-O-Matic 775G-R

The pen works reliably under conditions where ordinary pens fail:

It operates at temperatures ranging from -34°C to +120°C
It works underwater and in zero gravity
It writes at any angle, including vertically downward
The ink is thixotropic—it is solid at rest but liquefies when written with
It doesn't leak or cut out
It writes up to three times longer than standard ballpoint pens

The refill contains a pressurized nitrogen gas cartridge. A small metal cylinder presses against the hermetically sealed ink—this allows the pen to work under any conditions.

Materials and Construction

The body is made of plastic, and the cap is made of brass. The tip of the refill is a tungsten carbide ball. The clip allows it to be attached to a pocket or backpack.

The pen is compact and fits easily into a wallet or organizer.

A Gift for a Man—Practical and Prestigious

🎁 The Fisher Space Pen Cap-O-Matic is an excellent gift choice. It’s perfect for doctors, lawyers, military personnel, police officers, business leaders, teachers, high school seniors, and craftsmen.

It doesn't freeze in the winter or melt in the summer. You can keep it in your car or everyday bag—always ready to use.

Every Fisher Space Pen is precision-assembled, hand-tested, and comes with a lifetime warranty against manufacturing defects. It is shipped in a gift box.

Specifications	Value
Brand	Fisher Space Pen
Model	Cap-O-Matic 775G-R
Body Color	Red
Cap Material	Brass
Housing Material	Plastic
Nozzle Material	Tungsten carbide
Length	13.7 cm
Magazine	Fisher SPR4 – black, medium thickness
Compatible Refills	SPR Cartridge Series
Operating temperature	-34°C to +120°C
Warranty	Life-long
Contents of the Set	Pen and Gift Box

Frequently Asked Questions

At what temperatures does the Fisher Space Pen Cap-O-Matic work?

The pen works reliably at temperatures ranging from -34°C to +120°C. This makes it suitable for use in extreme cold in the winter and intense heat in the summer. Unlike standard pens, it does not freeze or leak. It is precisely because of these properties that it has been chosen by astronauts and cosmonauts for use in space.

Can the Fisher Space Pen write underwater?

Yes, the Fisher Space Pen Cap-O-Matic writes underwater and in other liquids. The cartridge is hermetically sealed and contains pressurized nitrogen gas, which forces the ink toward the tip regardless of environmental conditions. This technology was developed specifically for the needs of space missions.

What is the difference between thixotropic ink and regular ink?

The thixotropic ink is in a semi-solid state at rest—it does not run or leak from the pen, even when exposed to heat. Upon contact with paper and pressure, it liquefies and ensures smooth writing. That’s exactly why the Fisher Space Pen doesn’t leak in your bag or pocket and doesn’t smudge. Plus, the ink lasts up to three times longer than standard ink.

What is the warranty on the Fisher Space Pen Cap-O-Matic?

Every Fisher Space Pen comes with a lifetime warranty against manufacturing defects. Each model is precision-assembled and hand-tested before leaving the factory. The warranty covers defects in materials and workmanship, but not damage resulting from misuse.

Is the 775G-R model a good gift?

Yes, the Fisher Space Pen Cap-O-Matic 775G-R is an excellent choice for a gift. It comes in a gift box and features an elegant brass cap paired with a bright red barrel. It’s suitable for men and women in a variety of professions—doctors, military personnel, police officers, lawyers, engineers, and outdoor enthusiasts. It’s practical for everyday use and, at the same time, embodies a history and technology worth talking about.

What type of refill does the Fisher Space Pen Cap-O-Matic 775G-R use?

The pen comes with a black Fisher SPR4 refill and a medium line width. Compatible replacement refills are from the SPR Cartridge series. The refill contains pressurized nitrogen gas, which ensures consistent ink flow under all conditions—including in zero gravity and underwater.

How did NASA choose the Fisher Space Pen for its space missions?

Paul S. Fisher developed the space pen entirely with private funds—the company invested about $1 million without any funding from NASA. Fisher offered the pens to NASA in 1965, and after rigorous testing, the agency decided in 1967 to equip the Apollo mission astronauts with them. Approximately 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 spaceflights. To this day, both American astronauts and Russian cosmonauts use the Fisher Space Pen.