Item Type: Battery Terminal Connector Material: Copper + Brass Screw Diameter: Approx. 10mm/0.39in Inner Diameter: Approx. 16-18mm/0.63-0.71in Application: Universal 1Excellent Characteristics: The pure copper terminal block is equipped with high efficiency, bakelite insulation, with perfect safety performance. 2Size Details: The inside diameter of the heavy duty battery terminal is approximate 16?18mm, and the screw diameter is about 10mm. 3Easy to Install: The battery connector is easy to install and flexible to tighten without worrying about loosening the bolt from the bolt. 4Wide Usage: Used in the separation and distribution of welding machines, charging generators, ships, RVs, trucks, automobiles, solar cells. 5Powerful Function: The advanced battery clamps can effectively protect the battery terminal from rust and prolong the battery life. 2 x Battery Terminal Connector 2 x Gasket