"Product Overview： This complete watch case kit is designed for custom dive watch builds, combining premium materials, robust waterproof performance, and compatibility with popular automatic movements. Perfect for watchmakers and enthusiasts looking to craft a high-quality timepiece with classic dive watch styling. 1.316L Stainless Steel Case: Offers exceptional durability, corrosion resistance, and a luxurious gold finish that maintains its shine over time. 2.Unidirectional Rotating Bezel: Classic dive watch design for precise elapsed time tracking, with a serrated edge for easy grip even with wet hands. 3.Sapphire Crystal Glass: Virtually scratch-proof and highly transparent, ensuring your dial remains clear and protected. 4.200M Waterproof Rating: Built to withstand deep-water activities, making it a reliable choice for water sports and diving. 5.Stainless Steel Bracelet: Crafted from premium 316L stainless steel for lasting durability, corrosion resistance, and a refined, polished look. The solid link design provides a secure, comfortable fit, while the adjustable clasp ensures easy sizing and reliable wear during aquatic and daily use. 6.Wide Movement Compatibility: Supports the most popular automatic movements, giving you full flexibility for your custom watch project."