Features: 1. The main components of battery terminal connector are made of copper. Accessory screws and nuts are not copper. 2. Suitable for most vehicles, most cars, boats, van batteries. 3. The battery terminals are made of copper material with good electrical conductivity and flexibility. 4. Not easy to break, corrosion resistant, can reduce the voltage distortion and the current transmission loss. 5. Good electrical conductivity, convenient wiring and firm connection. 6. Suitable for 6V/12V positive or negative battery. Specification: Item Type: Car Battery Terminal Clamp Clip Material: Copper + Plastic Color: Red + Black Positive Inner Diameter: 18mm / 0.7inch Negative Inner Diameter: 17.5mm / 0.69inch Quantity: 2Pcs Package Weight: Approx. 91g Package List: 1 * Battery Terminal Red - Identification Plus (+) 1 * Battery Terminal Black - Identification Minus (-) 1The main components of battery terminal connector are made of copper. Accessory screws and nuts are not copper 2Suitable for most vehicles, most cars, boats, van batteries 3The battery terminals are made of copper material with good electrical conductivity and flexibility 4Not easy to break, corrosion resistant, can reduce the voltage distortion and the current transmission loss 5Good electrical conductivity, convenient wiring and firm connection