Compatible and applicable: The quick battery terminal connector is mainly used for SAE / JIS A type car battery, the connection is firm and not easy to damage. Safety protection: The Quick release device has a red positive "and" and a black negative "-", which are easy to identify to avoid the risk of electric shock. Material: Tin-plated pure copper battery terminal has good electrical conductivity and reduces transmission power loss. It has strong corrosion resistance and can be used for a long time. Widely compatible: suitable for battery terminal connectors for cars, trucks, buses, battery cars, new energy batteries , etc. Quantity: 1 pair of battery connector (1 positive, 1 negative); and pole inner diameter: 17.5 mm, pole inner diameter: 16 mm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.