Fisher Cap-O-Matic Space Pen M4C - Writes Upside Down, Under Water, In Extreme Temperatures

Fisher Space Pen Cap-O-Matic M4C is a chrome-finished, pocket-sized writing instrument built for reliability in demanding environments. Designed for professionals and outdoor enthusiasts who need a pen that writes when others won’t.

• Overall length: 5.25" (13.3 cm) for a comfortable, in-pocket fit.
• Finish: Chrome-plated body with a sleek, professional look.
• Ink & nib: PR4 black ink cartridge with a medium point for smooth, legible lines.
• Writing performance: Writes upside down, at any angle, underwater, through grease, and in extreme temperatures.
• Design: Cap-O-Matic mechanism with a convenient pocket clip for quick access.
• Packaging: Boxed for gift-ready presentation.

Thanks to the pressurized PR4 cartridge, this Space Pen delivers consistent ink flow across challenging conditions—whether you’re in a wet environment, working with oily surfaces, or braving temperature extremes. The 5.25" length and sturdy clip keep it within arm’s reach in a shirt pocket, on a field notebook, or attached to a tool belt. With its durable chrome finish and thoughtful packaging, it’s a practical choice for professionals, technicians, divers, travelers, and anyone who values dependable writing in tough environments.