1. Modular box design, easy wiring configuration. 2. The glass fiber reinforced nylon base and shell high mechanical strength and durability. 3. 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: Play a role of storage of a negative wire harness in automobiles, ships and yachts. The negative wires are gathered together to make storage more beautiful. Name: Red Bus Bar Box 300A M8 Stud Terminal bolt size: 4xM8 (about 5/16 inch) Maximum voltage: DC 48V Maximum connection amplifier: 300A Colour:black Material:metal+nylon Package Contents: 1 x Bus Bar Box Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.