1.Material: The battery bus bar base and cover are made of nylon, and the circuit board is made of nickel-plated brass; the terminals, studs, and screws are made of 304 stainless steel. The bus bar has a protective cover secured by screws, which adds an extra layer of protection to prevent accidental damage to the terminals. 2.Dimensions: The 12v distribution block includes 1 x 1/4' (M6) stud and 12 x M4 (8) screw terminals, equipped with ring tongue terminals, the bus bar can easily handle high currents, ensuring stable power distribution throughout the installation. 3.High current carrying capacity: Maximum operating voltage: 48V DC, Maximum continuous current: 150A. It is perfect for home projects, and the voltage/ampere rating is more than enough for most applications 4.Wide Application: This 12v marine bus bar is an excellent choice for anyone who needs a reliable power distribution solution for their car, boat, or craft power setup. The matching installation accessories make wiring easier and faster, saving time and energy