Material: The Battery Terminals Are Made Of Brass, With Good Electrical Conductivity And Corrosion Resistance, Which Can Reduce Voltage Distortion And Transmission Loss. Size: Positive Battery Terminal Connector ( 17.5Mm-19.1Mm) + Negative Battery Terminal Connector (15.9Mm-17.5Mm). Works Great For Replacing Worn And Corroded Terminals. Easy To Use: After Battery Installation, Connects To Battery Terminals By Pressing The Lever, So No Tools Required. The Wiring Is Convenient, The Connection Is Firm, And It Is Not Easily Damaged. Special Style: These Battery Connectors Are Bright In Color And Novel In Design. Designed For Top Post Batteries And Side Post Batteries With Standard Post Adapters Wide Applications: Suitable For Cars, Vans, Caravans, Motorhomes, Truck Batteries Etc. Just Be Sure To Connect The Correct Terminal For The Correct Polarity.