Features: 1.Equipped with a 12?24V voltmeter with an error of less than 0.5V to monitor the battery voltage in real time, easily understand the battery usage. 2.With standard 0/4/8 AWG gauge, the connector can connect multiple terminals of different sizes to the same terminal, and then connect the car battery to improve safety. 3.High?quality zinc alloy material, coupled with pure copper fastening ring, it is sturdy and durable, with better conductivity, can protect the car battery terminal from corrosion, ensures longer battery life. 4.The transparent cover protects the battery terminal from the surrounding environment and effectively prevents dust. 5.17.5mm international standard car battery universal inner diameter, applicable to most car batteries, which has wide application. Specification: Item Type: Battery Terminal Connectors Material: Zinc alloy Size: Positive and Negative Terminal is designed for a inner diameter 17.5mm/0.7in Tapering Post Fitment:Suitable for most models PackageList: 2 x Battery Terminal Connectors Note: Please allow 0.3?0.5mm difference due to manual measurement