The Inka Corporation has developed a new product category of writing instruments that are specifically designed for use in extreme environments. Inka accomplishes this by combining innovative designs, broad experience in the design and manufacturing of high-precision instrumentation for use in extreme environments, and a dedication to using the highest level of manufacturing and quality control available. The Inka 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.