High-Quality: Made of tinned copper, it has 4 ports for multiple cable connections, with good electrical conductivity and corrosion resistance, mainly used for SAE / JIS TYPE A rear car battery. Widely Applicable: Our battery terminal connectors suitable for cars, vans, motorhomes, caravan, truck batteries, etc. Please be sure to connect correct terminal to correct polarity. Size: For wires diameters 5.2 - 7.4mm (AWG gauges 1 - 4). Minimum wire size: 16mm (5/8"). Max wire clamp: 9.5mm/0.37in, mini wire clamp: 6.5mm/0.25in. Positive inner diameter: 17.5~19.1mm, negative inner diameter: 15.9~17.5mm. You Well Get: Package contains 2 battery terminal connectors (positive and negative), 4 insulation sleeves, 4 Terminal block , 1 Battery Terminal Cleaners, 2 battery anti-corrosion washers and a hex wrench. Enjoy Warranty: You will get quality products, if you have any questions, please contact us, we are always waiting for you here.