5 7/8" overall length. Dark gunmetal finish with a rubber lower barrel, providing excellent grip. Four functions: red ink, black ink, pencil and stylus. Eraser located under end button. Uses pressurized ink. Gift box. Writes reliably under extreme conditions: over fingerprints, over grease, extreme cold (-50°C), extreme heat (+200°C), over wet paper, in a vacuum, and at any angle, even upside down.