jewelry necklace women's multi-layer necklace round multi-layer pendant necklace berserk, Black

about titanium steel at present, stainless steel is commonly known as titanium steel in china, which is famous for its indifference texture and brightness. it has a wide range of uses, and its characteristics are strong acid resistance, strong alkali resistance, not easy to change color, not easy to be allergic, hard, not easy to deform, bright. it is mostly used in medicine, products, precious watches, pens and industry, etc.