This is a pure titanium necklace (chain) from Legier, a titanium accessory specialty store in Sanjo City, Niigata Prefecture, Japan. Azuki type Total length: 40cm Width: 1.8mm Includes a storage bag I purchased this but am selling it because the size doesn't fit me. It has only been tried on, but it is a used item and has been stored at home, so please refrain from purchasing if you are sensitive to this.