Su-Pen T-9 Model for iPhone/iPad/iPod touch (Black/Carbon) by Hamee This is an amazingly smooth and sleek writing feeling with Integrated cap. Su-Pen with amazing durability and lightness Dry carbon that is also used for racing car parts, is used for the pen axis. Flexible, very strong, durable, and does not change the shape even with a pinpoint force. Dry carbon requires high-skill to process. Japanese well experienced craftsmen finish each product by hand. The cap and pen are integrated, you don't need to worry about losing the cap and it reduces the damage to the tip of the pen when you carry it around.