Men's Watch Multifunctional Silicone Strap Mechanical Watch $ 35.62 product information Case material:High-quality metal case Strap material: High quality silicone strap Back cover material: Stainless steel hollow see-through bottom cover Mirror material: Hardened mineral glass Dial: High-end dial Buckle: Pin buckle Movement: Automatic tourbillon mechanical movement Function: Week/month/calendar/luminous Waterproof: 30M life waterproof Watch diameter: About 40MM strap diameter: 22MM Full length of the watch: 240MM Weight of the watch: 105G