We craft the strongest base for all your experiences and keep them safely. So it consists of building materials such as screws, cable covered by plastic and transperant plastic tube. The silver detail is also handmaded and carefuly made of melted plastic. Necklace is also decorated with Amazonite mineral stone. Every Mellow piece has it's own life code, so do this one - N4/016. As well it means this product is one of the kind