Specification: Car Battery Terminal,12V/24V Current, Length:54mm, Bolt Length:30mm, Head Width:21mm, Positive Dia:19mm, Negative Dia:17mm Material made of brass: The car battery terminals are made of high quality thick brass, good electrical conductivity, wear resistance, corrosion resistance, high hardness, away from rust, good electrical connection Perfect connection: the interior shape of the car battery terminals is light cone, to firmly grip the battery rod, smooth contact surface, reducing the risk of shaking Wing nut: 12v car battery is with a wing nut and can be tightened on the connected cable, easy and quick to install and disassemble, no wrench required Uses: Battery terminal for car, boat, van battery, battery great replacement for old and inappropriate battery terminals, with red and black, "+" and "" markings you can't go wrong