Fisher Space Pen - #B4 Chrome Shuttle Space Pen with Black Grid Design Style: Retractable with Side Release Button Length: 5.25" .320" Diameter Cartridge: Fisher Pressurized PR4 Black Ink Medium Point Packaging: Gift Box The Fisher Shuttle Pen ist the further development of the Astronaut Pen. Without compromises in quality Fisher developed a slimer pen that retains the amenity of the Astronaut Pens by combining it with latest technics. Fisher Shuttle Pens are nowadays also used in space: at space flights and even in the MIR space station.