Basic information ：  Length: Adjustable opening  Weight: 30.5 g Material: Brass Plated 18K Real Gold Maintenance instructions:1. Please seal and store it when not wearing it, and do not expose it to damp environments2. Before taking a shower, please remove jewelry such as necklaces, bracelets, and rings to avoid prolonged contact with hot water3. Necklaces, bracelets, rings, and other jewelry should avoid contact with seawater to prevent them from turning black or yellow4. Jewelry such as necklaces, bracelets, and rings that come into prolonged contact with sweat may turn black or yellow5. When necklaces, bracelets, rings, and other jewelry turn black or yellow, they can be wiped with a professional silver cloth that comes with the product, and the product will return to its original color