1Equipped with a 1224V voltmeter with an error of less than 0.5V to monitor the battery voltage in real time, easily understand the battery usage. 2With 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. 3Highquality 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. 4The transparent cover protects the battery terminal from the surrounding environment and effectively prevents dust. 517.5mm international standard car battery universal inner diameter, applicable to most car batteries, which has wide application. Item Type: Battery Terminal ConnectorsMaterial: Zinc alloySize: Positive and Negative Terminal is designed for a inner diameter 17.5mm/0.7in Tapering PostFitment:Suitable for most models 2 x Battery Terminal Connectors