ITEM NAME:1 Pair 12V Quick Release Car Battery Terminal Connector Battery Clamps Clip #JT1 Product Description Description: Features: 1. The product is made of copper die casting. Good manufacturing materials make the product life longer and more functional than ordinary alloy products. 2. Copper material has good conductivity, which can reduce voltage distortion and current transmission loss. 3. It has the characteristics of corrosion resistance, good conductivity and convenient wiring. 4. Firm connection. 5.Manufacturing process: The main parts of battery head are made of copper. Annex screws and nuts are not copper. Suitable for most vehicles using copper with good electrical conductivity, good elasticity, pile head will not break, anti-corrosion Specifications: Material: Copper Specification: positive inner diameter: 19mm/0.75", negative inner diameter: 17mm/0.67"; Notes: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-3cm measuring deviation due to manual measurement. Included: 1 Pair X Battery Clamps.Annex screws and nuts are not copper. Suitable for most vehicles using copper with good electrical conductivity, good elasticity, pile head will not break, anti-corrosion. Firm connection. It has the characteristics of corrosion resistance, good conductivity and convenient wiring.