Necklace: Silicone, Germanium, Magnetic Joint, Stainless Steel, Fashionable, High-Class Design, Popular Model, Many Baseball Players Wear It, Metal Allergy-Free It's suitable not only for sports but also for casual daily life. Wearing it in formal work situations will likely showcase your personal charm and good taste. Suitable for both men and women. Available in classic black, with a clever design, and pendants in charcoal gray and gold, making it stylish for both men and women. Length: Approximately 50cm The comfortable length, based on ergonomics, allows anyone to wear it regardless of their style. The material is made from silicone and 316L stainless steel, with germanium and titanium powder packed inside the silicone.