Reliable Material: Aluminum alloy material is chosen as the raw material because of its high strength, creep resistance and high electrical conductivity, which meets the requirements of battery terminals for material properties that can ensure stability and durability.With Fiber Washers: On the one hand, fiber washers increase the tightening force, resist loosening and ensure the stability of the component connection. On the other hand, it isolates the metal parts and keeps them from abrasion and corrosion in direct contact.Installation Instruction: Before installation, you need to make sure that the battery terminals are clean and free of rust and corrosion, if necessary, use sandpaper to sand them. Secure the battery cables to the connectors and fit the connectors to the terminals.Excellent Conductivity: This battery terminal connector is a battery replacement accessory with good electrical conductivity, which minimizes resistance and improves the efficiency of current transfer, ensuring the battery provides a stable power supply to the car.Widely Applicable: Measuring 1.461.97 inches, this Connector has an adjustable inner diameter of 0.63 to 0.71 inches, which can be adjusted to fit your battery terminals by tightening the bolt. It fits many sizes of battery terminals for cars, boats, small yachts and RVs.