Fisher Space Pen Stowaway Black
Takes compact to an entirely different level. Only .25" in diameter and 3 7/8" in length. Black aluminum construction with brass clip. 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.