Fisher Space Pen Bullet Space Pen 400BTN-CK - Writes Upside Down At Any Angle Underwater And In Extreme Temperatures

The Fisher Space Pen Bullet Space Pen 400BTN-CK is a compact, reliable writing tool built for professionals, adventurers, and anyone who needs dependable notes in challenging environments. At 3.75" closed with a PR4 black ink cartridge and a medium point, it delivers consistent, legible writing—from the field to the desk—while enduring extreme conditions and tough surfaces.

• Length: 3.75" closed, compact and easily fits in a pocket, clip, or pen sleeve.
• Ink and Point: PR4 black ink with a medium point for smooth, legible lines.
• Extreme-Conditions Writing: Writes upside down, at any angle, underwater, over grease, and in extreme temperatures.
• Finish and Engraving: Black Titanium Nitride coating with a Celtic knot engraving for a distinctive, durable look.
• Packaging: Boxed, ready for gifting or storage.

The pressurized PR4 ink cartridge ensures you can rely on this space pen in demanding contexts—whether you're jotting notes under water, labeling gear that’s greasy, or capturing ideas in freezing or hot environments. The durable black titanium nitride finish resists wear and corrosion, while the Celtic knot engraving adds a refined touch that helps your pen stand out in any kit. Perfect for field technicians, divers, hikers, researchers, and travelers, the Fisher Space Pen Bullet 400BTN-CK is designed to perform when ordinary pens falter, making it a practical addition to any professional or personal toolkit.