Battery Terminal Kit (1 Positive, 1 Negative) with M8 Bolts. These are universal battery terminals, suitable for 17.5mm diameter, (+) 19mm diameter battery head. The car battery clamps are made of pure copper, which has good electrical conductivity, corrosion resistance and durability. Suitable for 12V/24V batteries, for batteries with top posts or side posts with standard post fitting. The car battery terminals are marked (+) and (-) identifier, easy to identify to avoid the risk of electric shock and easy to install and use.