Feature 1It has good electrical conductivity and corrosion resistance, which can reduce voltage distortion and transmission loss. 2Wide application of range, can used for automobiles, trucks and caravan battery terminal connector. 3The battery terminal is made of pure copper, which is better than aluminum alloy and makes it have stable performance and high quality. 4Convenient connection, which is sturdy and firm, not easy to loosen, very convenient. 5Package including 10pcs black and red terminal clamps connectors, which is made to meet your needs.Item Type: CopperBatteryTerminalClampsConnectorsMaterial: Pure Copper+IronPostive Inner Diameter: Approx. 17mm/0.67inNegative Inner Diameter: Approx. 18mm/0.7inFitment: Universal .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List10 x CopperBatteryTerminalClampsConnectorsNotePlease allow 0.5‑1mm difference due to manual measurement.