Machine Era Pen- Solid Brass Solid brass provides a hefty weight, balance, and exceptionally satisfying in-hand feel After a few days use, the metal will patina to a spent shell casing golden brown Ink is delivered by the well-loved Pilot G2 cartridge (included). No moving parts or plastic inserts. Machined from solid stock in Richmond, VA A threaded cap keeps ink where you want it, and not where you dont