The Inka Stainless Pen is fabricated from high-strength aerospace-grade materials. Following strict specifications, the stainless steel barrel is hardened, CNC machined, centerless ground then laser engraved. Lightweight, watertight and built to withstand harsh environments, the pressurized ink cartridge ensures the pen will write wet or dry at any angle, any temperature, and any altitude. It also features a stylus for operating a PDA. The Inka Pen is manufactured in the U.S.A. under the strictest quality control standards and is designed and built to last a lifetime.