The Belcher Round Rolo Chain bracelet is made of sterling silver. The silver has no nickel plating, so it is completely hypoallergenic. The diameter of the link is 6.8 mm. The links have a round shape. The weight of the jewelry depends on the length ~ 13-16 grams. The clasp is a spring ring. The bracelet and the lock are made by me completely by hand. I can make for you a jewelry of any complexity, just write me a message. PREVENTATIVE CARE: Wearing jewelry: Tarnishing of jewelry can be prevented by wearing it regularly. The skin's natural oils "cleanse" the silver and make it shine. Avoid contact : Contact with certain household products including bleach, sweat, chlorinated water or substances containing sulfur (e.g. mayonnaise, egg, mustard, onions, wool, etc.) will cause corrosion and tarnishing. Therefore, it is best to remove silver jewelry when cleaning. Direct sunlight also causes tarnishing of silver. So be careful and remove your jewelry when sunbathing or going to the beach. Lotions, cosmetics, hairdressing products and perfumes :are also "enemies" of silver and tarnish it faster. It is therefore advisable to wear jewelry last, as a finishing touch! Storage: Since silver tarnishes in the air, store the jewelry box in a place with low humidity.