Fisher Space Pen M4 Black M4 Cap-O-Matic Series Civilian. 5 1/8" closed.
This unique design engages the point with entire pen top. The standard
top button has been removed to create a sleek, easy-to-use writing
instrument. Black aluminum construction with chrome clip and tip. Loaded
with medium point black ink cartridge. Uses Fisher pressurized refill
FP1211 (blue ink) or FP1241 (black ink). Writes reliably under extreme
conditions: over fingerprints, over grease, extreme cold (-50°C),
extreme heat (+200°C), over wet paper, in a vacuum, and at any angle,
even upside down.
Country of Origin: USA