这是附加信息
The entire case is made of imported composite carbon fiber, a new type of material with a timeless black color and an elegant, luxurious texture. Carbon fiber is flexible on the outside but strong on the inside, lighter than aluminum yet stronger than steel, and also corrosion-resistant. The case has a variety of textures, and each carbon fiber watch will display a unique pattern due to its different cutting methods, making it a one-of-a-kind piece. It is powered by the 4130 skeletonized movement, and the watch has a 40mm diameter.