Feature:1. Highest amperage rated bus bar (300A) with M8 terminal studs (also available in M10).2. fiber reinforced nylon base and enclosure ensures great mechanical strength and durability.3. Heavy-Duty module box design for easy wiring configurations.4. Blank write-on space on the top allows easy labeling for each branch.5. 4 studs (5/16\"), Removable windows for unobstructed wiring.6. 4 studs (5/1inch), Removable windows for unobstructed wiring.7. Blank write-on space on the top allows easy labeling for each branch8. 4 studs (5/16inch), Removable windows for unobstructed wiring.9. 4 studs (5/16 inch), Removable windows for unobstructed wiring.Specification:Overview: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.Features:Highest amperage rated bus bar (300A) with M8 terminal studs (also available in M10).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: Brass, Nickel platedBase & Cover Material: Nylon, Fiber reinforcedMax Operating Voltage: DC 48VMax Amp per circuit: Determined by wires connectedTerminal Stud Size: 4*M8 (5/16")Size: 13.5*7*5cm / 5.31*2.75*1.97inProduct Weight: 369g / 13.01ozPackage Size: 13.5*7*5cm / 5.31*2.75*1.97inPackage 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 * Studs4 * Screws1 * Distribution BoxPackage List:4 * Studs4 * Screws1 * Distribution Box