1Compatibility: Perfect for all types of power and ground distribution. Widely work in automobiles, vessels, devices or other electrical applications. 2Features: Used as the main incoming line to connect to each electrical branch. Two screw holes at both ends of the bus bar, use M4 screws to fix it in place. 3Performance: Nickel copper plated bus contact plate has good conductivity and low contact resistance. Transparent cover and screw have excellent heat resistance. 4Function: Bus bars bring the wiring harnesses together, organizing the power cables inside your vehicle and boat in a logical way and keeping the interior neat and clean. 5Advantages: Stable performance, premium Abs and nickel plated copper material, high strength and durability even in the harshest environment.