Product material: high quality brass Anode diameter: 17-19mm Negative Diameter: 15-17mm Product Weight: 1 pair about 220g Product features: strong electrical conductivity, anti-oxidation and corrosion resistance Packing list: 1 pair of car battery batteries We only sell car battery batteries, not other items in the picture. Due to the differences between different monitors, the pictures may not reflect the actual color of the item. Due to manual measurement, please allow slight errors in size.