FUNCTIONS IN EXTREME CONDITIONS. THE PRESSURIZED INK CARTRIDGE WRITES UPSIDE DOWN AND THROUGH MOISTURE WITHOUT SMEARING OR WASHING OFF. WRITES UPSIDE DOWN Pressurized ink cartridge performs in temperatures from -30F to 250F, under water (up to 35 ft), and at any angle. INK WON&';T SKIP Proprietary ink and delivery system used exclusively in Rite in the Rain Pens will write without skipping in extremely wet conditions. WRITES THROUGHa | Permanent ink writes through water, sweat, grease, and mud without clumping or smearing. SPECIFICATIONS BARREL COLOR: Flat Black MATERIAL: Powder-coated brass FEATURES: Pocket clip INK COLOR: Blue POINT SIZE: .9 mm CARTRIDGE: Pressurized, performs in temperatures from -30F to 250F, under water (up to 35 ft) REFILLS: Available SINGLE UNIT SIZE: 5.125" L, .375" D WEIGHT: .05 lbs MANUFACTURED: U.S.A.