Fisher Rainbow Bullet Space Pen 400RB - Writes Upside Down Underwater At Any Angle

The Fisher Space Pen Rainbow Bullet Space Pen 400RB is a compact, rugged writing instrument built for professionals, outdoors enthusiasts, and anyone who values reliable performance in challenging conditions. Its rainbow titanium finish adds a distinctive, collectible look to your everyday carry or gift.

• Length (Closed): 3.75" overall, a pocket-friendly size that travels with you.
• Finish: Rainbow titanium color with a striking, iridescent look.
• Refill: PR4 black ink, medium point for smooth, legible lines.
• Writeability: Writes upside down, at any angle, under water, over grease, and in extreme temperatures.
• Durability and reliability: Designed to maintain ink flow across harsh environments and everyday use.
• Packaging: Boxed, ready for gifting or storage.

Whether you’re tackling fieldwork, outdoor adventures, or technical tasks in a workshop, this pen helps you capture notes when others can’t. The compact bullet design stays comfortable in hand and fits neatly in a pocket or toolkit, while the rainbow finish makes it easy to spot in a crowded drawer. Its capability to write in challenging conditions—whether greasy, wet, or very hot or cold—means you can rely on it for measurements, labeling, or quick sketches wherever you are. The boxed presentation also makes it a thoughtful gift for students, engineers, divers, or hobbyists who appreciate reliability with a dash of personality.