High-quality Material: Made of pure copper with tin-plated, with good corrosion resistance and conductive performance. | The screws are made of stainless steel, which ensures that they will not get corroded in a humid environment. | Wide Application: These battery terminal connectors can be used for most vehicles, fit for most cars, boats, van 6V/12V batteries. Just make sure to connect the correct terminal for the correct polarity. |