Specification: Car Battery Terminal, Power 12V/24V, Length: 54mm, Bolt Length: 30mm, Head Width: 21mm, Positive Diameter: 19mm, Negative Diameter: 17mm /p> Brass material: The car battery terminals are made of high quality thick brass, good electrical conductivity, wear resistance, corrosion resistance, high hardness, no rust, good electrical connection Perfect connection: the inner shape of the car battery terminals is slightly tapered, to firmly grip the battery stick, smooth contact surface, reduce the risk of shaking Wing nut: The 12V car battery has a wing nut and can be clamped on the connected cable, easy and quick to install and disassemble, no wrench required Use: clamp battery for car, boat, van battery Great replacement for old and unused battery clamps Red and black “+” and ?-? You can’t go wrong with markers