The Fisher Space Pen is a legend of American history, having revolutionized the ballpoint pen to make it suitable for astronaut use during the space program. The 400 Bullet is the original: chrome-plated brass, 3.75 inches capped and full-size when posted, writes upside down, underwater, and in temperatures from -30°F to +250°F. There's a reason it's the pen NASA chose. Made in Boulder City, Nevada since 1965, this pen truly is a piece of history.