The first parameter of THB Santos hollow steel belt series is synchronized with the genuine product. Table diameter 39.8 mm movement Swiss Ronda 4S20 modified mechanical movement case thickness 9.08 mm dial color hollow dial shape square SKU black silver silver circle silver rose circle silver gold circle The strap is made of imported fluororubber quick-release tips. The buckle is made of Cartier's latest folding buckle. The back is a transparent lens, sapphire mirror hands, blue burnt steel blue hands. The black model uses imported green luminous crown and is inlaid with gemstones.