The Rite in the Rain Mini Bolt Action Pen's  triangular barrel and textured grip ensure reliable handling. Plus, rest assured, it's durable enough to survive drops. Attach it securely with the strong lanyard clip. With its bolt-action feature, you won't have to worry about accidental openings in your pocket. Easily replace ink with full-size cartridges. Pressurized, performs in temperatures from -34°C to 121 °C Works even under water in 10 m depth Weight 13 g Dimensions Length: 11 cm Materials Tough plastic