Heavy-Duty Module Design Bus-Bar Box Terminal Board 300A with 4 Terminal Studs Car Styling Highest amperage rated bus bar Overview: The Bus-Bar Box plays a role of accommodating a negative wire harne in a car or a ship yacht, and brings the wires of the negative electrode together to make the box storage more beautiful.Features: Highest amperage rated bus bar (300A) with M8 terminal studs (also available in M10). Gla fiber reinforced nylon base and enclosure ensures great mechanical strength and durability. Heavy-Duty module box design for easy wiring configurations. Blank write-on space on the top allows easy labeling for each branch. 4 studs (5/16), Removable windows for unobstructed wiring.Specifications: Bus Material: Bra, Nickel plated Base & Cover Material: Nylon, Gla Fiber reinforced Max Operating Voltage: DC 48V Max Amp per circuit: Determined by wires connected Terminal Stud Size: 4*M8 (5/16) Size: 13.5*7*5cm / 5.31*2.75*1.97in Product Weight: 369g / 13.01oz Package Size: 13.5*7*5cm / 5.31*2.75*1.97in Package Weight: 374g / 13.19ozUse Instructions: The middle M8 is connected to the negative pole of the device, and the M8 at both ends is connected to the negative pole of the battery; a small current is collected from each device, such as 3A 5A 10A 8A... A thick wire is integrated to connect a large current to the battery in the range of 150A.Package List: 4 * Studs 4 * Screws 1 * Distribution Box