Hublot Classic Fusion 521 Series Men's Watch - Lightweight Design. The case is made of finely polished material, consistent with the original, with a diameter of 42mm and a thickness of 12.05mm. It uses a Japanese imported quartz 5-hand chronograph energy-saving movement, with the movement being stable and requiring no repairs. The dial offers over a hundred options, featuring various colors, stripes, and patterns identical to the original. The strap is made of imported rubber and top-layer cowhide, and it comes with an original folding clasp.