1Bus bar with the highest rated amperage (300A) with M8 terminal studs (also available in M10). 2The glass fiber reinforced nylon base and shell ensure excellent mechanical strength and durability. 3The blank writing space at the top makes it easy to mark each branch. 4 studs (5/16in), movable window, unblocked wiring. 4The heavy-duty modular box design is convenient for wiring configuration. 5Comes with 4pcs mounting screw, which provide much convenience for your using. Item Type: Bus Bar Power Distribution BoxMaterial: Plastic+Metal+NylonSize: Approx. 13.9x7cm/5.5x2.8inOverview: The Bus-Bar Box plays a role of accommodating a negative wire harness in a car or a yacht, and brings the wires of the negative electrode together to make the box storage more beautiful.Bus Material: Brass, Nickel platedBase And Cover Material: Nylon, Glass Fiber reinforcedMaximumOperating Voltage: DC 48VMaximum Amp Per Circuit: Determined by wires connectedTerminal Stud Size: 4 x M8 (5/16in) 1 x Power Distribution Box4 x Mounting Screw