Features: 1.It has good electrical conductivity and corrosion resistance, which can reduce voltage distortion and transmission loss. 2.Widely used in cars, marines, RVs, trucks, campers, ATV, UTV, vehicle battery banks, etc. And it can also used for automobiles, trucks and caravan battery terminal connector. 3.The battery terminal is made of pure copper, which is better than aluminum alloy and makes it have stable performance and high quality. 4.Package including 4pcs terminal clamps connectors and 6pcs copper ring, which is made to meet your needs. 5.Convenient connection, which is sturdy and firm, not easy to loosen, very practical. Specification: Item Type: Copper Battery Terminal Clamps Connectors Kit Material: Pure Copper Postive Inner Diameter: Approx. 16mm (5/8in) Negative Inner Diameter: Approx. 17mm (11/16in) Copper Ring Terminal Length: Approx. 40mm (1.6in) Fitment: Universal Note: Please allow 0.1?0.5mm difference due to manual measurement.