ITEM NAME:12V-Adjust-Car-Auto-Battery-Terminal-Clamp-Clips-Connector-Positive-Ne VJC Descriptio n Material: plastic + copper Color: color Size: 75 × 30MM Product list: Battery Terminal With Red( +Positive ) Cover *1, Battery Terminal With Blcak (- Negative) Cover*1 Product Descriptionï ¼Å¡ The main components of the battery pile head is made of copper. Attachment screw and nut are not copper. Suitable for most vehicles Copper material has good conductive performance, good flexibility The pile head will not break, corrosion resistance, can reduce the voltage distortion and the current transmission loss. Corrosion resistance, good conductive performance, wiring is convenient, and the connection is firm. High Quality Universal Car Truck Battery Terminal clamp 1set ( Positive 1pcs + Negative 1pcs) Type: Lead-free , size Adjustable. Lift up plastic protection covers. Fit for most car, boat, van battery. Fits 6V/12V positive or negative battery. High quality buy, happy buyï ¼ 12V-Adjustable-Car-Auto-Battery-Terminal-Clamp-Clips-Connector-Positive-Negativ.The main components of the battery pile head is made of copper. We'd like to settle any problem in a friendly manner. Corrosion resistance, good conductive performance, wiring is convenient, and the connection is firm.