The 2 Pair Heavy Duty Lead Alloy Battery Terminal Set is made of Lead alloy. These high quality battery terminals are solderless type replacement terminals.Thoroughly engineered to meet or exceed your expectations for fit, form, and function, this product can work on both 12 volts and 6 volts. Gives maximum battery performance; get the most out of your batteries with increased conductivity and corrosion prevention. They are suitable for batteries fitted to Cars, Buses, Trucks, Boats etc. These Battery Terminal Connectors come with good conductive performance, corrosion resistance, can reduce voltage distortion and transmissions loss. Wiring is convenient, and the connection is firm