Simple and comfortable. Inside diameter (positive): 19 mm / 0.74 in Inside diameter (negative): 17 mm / 0.66 in Dimensions: 6.9 x 4.7 x 2.8 cm / 2.7 x 1.9 x 1.1 in Type: Battery Terminals Quantity: 1 Pair (Red Cover and Blue Cover) Material: Metal + Plastic One red clamp (positive) and one blue clamp (negative) Designed for post batteries and side batteries with standard post adapters Item dimensions: 6.9 x 4.7 x 2.8 cm / 2.7 x 1.9 x 1.1 in Heavy duty, suitable for 4 to 6 gauge wire Rated for 500A continuous current, 800A discharge current at 12V Quick release design allows for easy removal, charging, and replacement of boat or vehicle battery Ideal for battery installations in tight spaces Attaches to battery terminals by lifting the caps down to quickly remove or install Securely connects new battery with firm attachment Cable fixed by screw terminal For use with batteries featuring conventional round connectors Includes 1 pair of practical battery terminals for quick battery connection