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【Name】Anti-Slip Glasses Chain 【Material】Alloy [Length] Approximately 70cm excluding both ends: Can also be customized according to customer's requested size with a 1CM error due to handmade production. [Weight] Approximately 6.5 grams (actual weight upon arrival shall prevail) [Features] High-end Anti-Slip Glasses Chain, Fine Workmanship, Comfortable and Safe, Good Electroplating Texture, Fits on the Temple of Glasses to Prevent Glasses from Slipping During Exercise, Suitable for Matching Various Glasses and Clothing, Can Be Removed and Worn on Chest, Whether for Sports, Travel, or Attending Banquets, It's Your Favorite Glasses Companion. [How to Use] First, slip the rubber rings at both ends of the glasses chain onto the temple arms, then use the metal clips on the rubber rings to hold them against the temple arms and secure them. Shipping: The default is ZTO.If you need anything else, please contact customer service.Orders placed before 5:00 on the same day can be shipped without needing to be freshly made.If you need freshly made products, customer service will contact you in advance. Jewelry Maintenance: 1. Jewelry should be replaced frequently. For the same piece of jewelry, avoid wearing it for extended periods, especially in hot summers. The coating of jewelry can easily erode with prolonged exposure to sweat, so it's advisable to prepare multiple pieces for frequent replacement 2. Contact with chemicals can easily damage jewelry. The scent of bathing, chlorine in swimming water, salt in seawater, etc., can cause corrosion to the jewelry coating, so all jewelry should be removed before bathing or swimming 3. Collision can easily cause scratches; store carefully. Do not overlap the jewelry pieces together; store them in their original packaging bags or in jewelry boxes with separate compartments to avoid scratching the surface due to collision 4. Clean the jewelry from time to time, using a soft fine-bristle brush to scrub the surface of the jewelry to remove surface stains 5. Apply a layer of transparent nail polish on the metal surface to prevent contact between the accessory and air, allowing for longer wear time