brand new and high quality Features: 1. Modular box design, easy wiring configuration. 2. The glass fiber reinforced nylon base and for shell ensure high mechanical strength and durability. 3. The box is detachable for barrier-free wiring, which reasonably accommodates the cables inside the vehicle and ship. 4. Actual Use: The middle M8 is connected to the negative rod of the device, and the M8 at both ends is connected to the negative rod of the battery; a small current is collected from each device, such as 3A, 5A, 10A, 8A,etc. Integrate a thick line to collect a large current in the range of 300A To the battery. 5. Good Function: for Play a role of storage of a negative wire harness in automobiles, ships and yachts. The negative wires are gathered together to make the box storage more beautiful. Bus Bar Box Board Set only,other accessories demo in the picture is not included. Specification: Name: Red Bus Bar Box 300A M8 Stud Terminal bolt size: 4xM8 (about 5/16 inch) Material: nylon/glass fiber, stainless steel and copper Maximum voltage: for DC 48V Maximum connection amplifier: 300A Material: Nylon/glass fiber+stainless steel+copper Size: app.13.8x6.9cm/5.43x2.72in Optional Color: Black, Red Quantity: 1 Set Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 x Bus Bar Box Board 4 x Screw