Rite In The Rain’s All-Weather Clicker Pen is 5 1/4″ long. Metal barrel with pocket clip. Black ink. Writes in any weather. Writes at any angle, even upside down. Pressurized cartridge. Ink is permanent, will not dry out. Extreme temperatures: -30F to 250F. Skips less – writes over water, grease, fingerprints, and photographs. Perfect for use on Rite in the Rain field books and paper.