Metal:100% solid 304stainless steel, high quality and environmentally friendly, nickel free, hypoallergenic, Suitable for sensitive skin. Stainless steel is hypo-allergenic making it a great choice for someone whose skin is sensitive to metal. Also, it will not turn your skin green or any other color. Very Sturdy and Durable Cuban Chain, Smooth Surface, Comfortable Wearing Feeling. Improved Lobster Clasp, Easy to Use and Better Quality; Whether you are wearing a business suit, casual outfit or bluejeans, you will look tastefully refined in this men's cuban link chain.