1 Pair Battery Terminals Battery Terminal Clamp Connector with 6 Copper Ring for Car Positive and Negative,Battery Terminal Clamp ConnectorPremium Material: The power connectors are made of high quality copper, with corrosion resistance, good electrical conductivity, easy wiring and solid connection. The plastic cover is an insulating cover, which is dustproof and moisture-proof, serving a long time. Quick Release: Car battery connectors are designed for users who usually replace batteries, the connectors allow quick disassembly for charging and storing your marine or vehicle batteries. Good Performance: Battery cable terminal with good conductive performance, can reduce voltage distortion and loss of transmissions. The wiring is convenient and the connection is firm. Widely Application: The wire on terminal makes it faster and easier for installation. These are not only 12v battery terminals, but also for 24v and 48v, used for battery extension, parallel connection and ground connection for car, vehicle, RV and boat, marine, etc. Package includes: one red clamp (positive) and one black clamp (negative), the cable is fixed by screw clamp; Positive Electrode Diameter: Approx. 19mm/0.75inch; Negative Electrode Diameter: Approx. 17 mm/ 0.67 inch (6 copper ring terminals). [Making process of battery head]: The main component of the battery cell head is made of copper. Accessory screws and nuts are not made of copper. Fits most vehicles. [Product name] Copper stamped battery connector [Product material] copper skin [Product specifications] 1. Positive inner diameter: 17mm, negative inner diameter: 16mm (see the drawing above); 2. Positive inner diameter: 12mm, negative inner diameter: 11mm (no drawing yet); [Weight]: About 147g for one set (large size) 【Product Description】 1. The product is made of die-cast copper. 2. Copper materials are both plastic and have good conductivity, which can reduce voltage distortion and reduce current transmission losses. 3. It has the characteristics of corrosion resistance, good electrical conductivity and convenient wiring. 4. The wiring is firm.