4 Pcs Battery Terminals Connector: You will receive 2 pairs car battery terminals, 4 pieces in total. There are 2 red positive terminal clamps and 2 blue negative battery clamps. These car battery terminals are suitable for connecting and disconnecting the battery in the car terminal. Premium Quality: These quick-release battery terminals are made of good quality copper and ABS. Battery quick release connectors feature strong connection and resist corruption, which have good electrical conductivity. In addition, the blue/red ABS cover is an insulating, durable, dust-proof and moisture-proof cover. Dimensions Information: The 12v battery terminals are compact in size, which is very suitable for installing batteries in small spaces. The inner diameter of the positive (red) terminal is 19mm; The inner diameter of the battery negative (blue) terminal connector is 17mm. This quick clamp battery terminal set is suitable for wires from 4mm to 6mm in diameter. Easy to Use: Car battery terminal lugs usually only take 10 minutes to complete. All you need is a wrench and a battery quick connector. Recreational battery terminal threads also make installation quick and easy. These car battery terminals are generic in that they also apply to 12v battery, 24v battery and 48v battery. Wide Usage: These 2 battery terminal pairs are ideal for users who frequently replace batteries on their own. The battery terminals are compatible with most cars, trucks, caravans, vehicles, sedans, vans, vans, boats, etc. The battery pod allows quick charging and removal of vehicle or boat batteries. Make sure to match the positive and negative electrodes of the battery correctly.