This One off pen is carefully crafted from premium materials and machined with state of the art CNC equipment. The grip, body and cap are made out of Flamed Zirconium. The clip screw, tip and end piece are made out of Tellurium Copper. The clip and Parker Adapter are made from Grade 5 6Al4V Titanium. The pen comes equipped with a medium black Fisher Space Pen pressurized ink cartridge. This pen can be used with a Pilot G2 by removing the Fisher adapter. To replace the cartridge, unscrew the tip. Included is a package of rubber o-rings, to be applied to the grip if desired. Excellent condition. Comes with original tube and papers.