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.1 x Power Distribution Box 4 x Mounting Screw Item Type: Bus Bar Power Distribution Box_x000D_Material: Plastic+Metal+NylonSize: Approx. 13.9x7cm/5.5x2.8in_x000D_Overview: _x000D_The Bus-Bar Box plays a role of accommodating a negative wire harness in a car or a ship yacht, and brings the wires of the negative electrode together to make the box storage more beautiful._x000D_Bus Material: Brass, Nickel plated_x000D_Base And Cover Material: Nylon, Glass Fiber reinforced_x000D_Maximum Operating Voltage: DC 48V_x000D_Maximum Amp Per Circuit: Determined by wires connected_x000D_Terminal Stud Size: 4 x M8 (5/16in) 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.1 x Power Distribution Box 4 x Mounting Screw