1Busbar with maximum rated current (300A) with M8 terminals (M10 also available). 2 Glass fiber reinforced nylon base and shell ensure excellent mechanical strength and durability. 3 Empty writing spaces at the top make it easy to label each branch. 4 studs (5/16 in), removable window, clear wiring. 4. Heavy-duty modular box design facilitates wiring configuration. 5 Comes with 4 mounting screws, providing great convenience for your use. Project Type: Busbar Distribution Box Material: Plastic + Metal + Nylon Size: Approx. 13.9x7cm/5.5x2.8in Overview: Bus-Bar Box plays the role of holding the negative wire harness in cars or yachts, and gathers the negative wires together to make the box storage more beautiful. Busbar material: Brass, nickel plated Base and cover material: Nylon, fiberglass reinforced Maximum operating voltage: DC 48V Maximum current per circuit: Determined by wires connected Terminal stud size: 4 x M8 (5/16 in) 1 x power distribution box 4 x mounting screws