Fisher Cap-O-Matic Space Pen M4B - Writes Upside Down, Under Water, In Extreme Temperatures

The Fisher Space Pen Cap-O-Matic Space Pen M4B is a compact, rugged writing tool built for professionals who need reliable ink in extreme conditions. With a matte black finish, a pocket clip, and a pressurized cartridge, it delivers consistent writing wherever you go.

• Length: 5.25" overall, a compact, pocket-friendly size.
• Finish: Matte black exterior for an understated, durable look.
• Clip: Convenient pocket clip helps keep it within reach.
• Ink and Nib: PR4 black ink with a medium point for clean, legible lines.
• Cap-O-Matic Mechanism: Cap design with secure cap and quick re-capping for on-the-go use.
• Write-Anywhere Capability: Writes upside down, at any angle, under water, over grease, and in extreme temperatures.
• Packaging: Boxed for gifting or storage.

With its pressurized PR4 ink, the Space Pen Cap-O-Matic maintains steady ink flow across challenging environments—rain, grease, cold, heat, or upside-down notes. The 5.25" length fits comfortably in a pocket or tool bag, while the matte finish and sturdy clip keep it accessible during fieldwork, repairs, or service calls. This pen is ideal for technicians, outdoor professionals, and anyone who needs to capture quick notes without worrying about conditions—and it arrives boxed, ready to gift or stash for later.