With its compact size, durable construction, reliable performance, and replaceable ink cartridge, the Nite Ize Inka Mobile Pen & Stylus is everything you need for writing and staying connected on the go. . Touch screen-compatible stylus works with iPads, iPhones, Android devices, and other touch screen devices. Replaceable pressurized blue ink cartridge lets you use the Inka pen anywhere, anytime, even in extreme conditions~ Writes smoothly and consistently in extreme temps, upside-down, at any altitude, and even underwater!. Made of lightweight, durable carbon fiber and nylon components. Integrated carabiner clip allows for secure attachment and easy release. Dimensions: 4.25 x 0.71 x 0.43 in. (10.8 x 1.8 x 1.1 cm). Weighs just 0.35 oz. (10 g) 94664026780 20749000012 IMP-M1