Material: 316L Stainless Steel , 18K Gold Plated Size: wide 1.6cm Origin: California, USA  Material: Our products are made from the top-grade 316L stainless steel - a metal that is nickel-free and does not fade or blacken and 100% hypoallergenic for the benefit of those with sensitive skin.  18K gilding is used to achieve gold color with beautiful shade and make the product resistant to the external environment. S925 sterling silver plating is used for the silver color products.