The N4130 movement Cosmic Chronograph Datona series carbon fiber Diw custom watch has a diameter of 40MM, which is the same size as ordinary Datona. The case as a whole is made of carbon fiber material, carbon fiber material is a new type of material, the color is never outdated black, the overall pattern is very elegant and luxurious. Carbon fiber is soft on the outside and tough on the inside, lighter than aluminum, stronger than steel, and resistant to corrosion. The matte black texture of the case is changeable, and each carbon fiber watch will show different patterns due to different cutting methods, becoming a unique existence. The strap is Velcro design, the front is made of nylon, the back is made of cowhide, and the buckle is also made of carbon fiber.