HIGH QUALITY With 3 options: 3-pin positive negative battery terminals with material: pure copper plate and plastic. DIMENSION: Battery positive pole hole diameter: 0.74 inch (19mm). Battery negative pole hole diameter: 17mm (0.67 inch). POWER OUTPUT: - Battery cable ends Suitable for 6/12 volt positive or negative battery plates. Agricultural vehicles, battery vehicles, etc. can be used. AREA OF USE: - Battery connections Connections for cars, vans, caravans, motorhomes, truck batteries, etc. EASY DIFFERENCE - 2 colors of the battery terminals to differentiate positive and negative connections: black (-), red (+)