★Thickness: 16 Gauge (1.2mm) ★Bar Length: 6mm ★Externally Threaded Ball Clousure ★Size of Top design: Spider: about 7.5 mm Spider Web: 6 mm ★The bar is surgical steel ★The top design is copper with rhodium plated in order to make designed shape. Please avoid exposing items to harsh chemicals, always take off your jewelry when dealing with chemicals, take your jewelry off when swimming in heavily chlorinated pools as the chlorine can damage the plating, avoid contact with perfumes and cosmetics which affect plating, and never use alcohol or harm chemicals such as hydrogen peroxide on body jewelries piercings.