"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. Product Features: 1.316L Stainless Steel Case: Offers exceptional durability, corrosion resistance, and a luxurious gold finish that maintains its shine over time. 2.Sapphire Crystal Glass: Virtually scratch-proof and highly transparent, ensuring your dial remains clear and protected. 3.100M Waterproof Rating: Built to withstand deep-water activities, making it a reliable choice for water sports and diving. 4.Rubber Strap: Comfortable, flexible, and resistant to water and sweat, perfect for all-day wear and aquatic use. 5.Wide Movement Compatibility: Supports the most popular automatic movements, giving you full flexibility for your custom watch project."