1. Modular box design for easy wiring configuration. 2. Fiberglass-reinforced nylon base and housing to ensure high mechanical strength and durability. 3. The box is detachable for obstacle-free wiring and can reasonably accommodate the wires inside vehicles and boats. 4. Usage method: Connect the negative pole of the device to the middle M8, and connect the negative pole of the battery to the M8 at both ends; collect the small currents of each device, such as 3A, 5A, 10A, 8A, etc., and integrate them into a thick wire to carry a large - current battery of up to 300A. 5. Function: It serves to collect the negative - pole wiring harnesses in cars, boats, and yachts, bringing the negative - pole wires together, and the box storage is more aesthetically pleasing. Name: Red busbar box 300A M8 stud Terminal bolt size: 4x M8 (5/16 inches) Maximum voltage: DC 48V Maximum connection current: 300A Color: Red Material: Nylon/fiberglass + stainless steel + copper Packaging contents: 1 busbar box 4 screws Only the above packaging contents are included, and no other products are included. Note: The color of the items in the picture may vary slightly from the actual product due to lighting during shooting and different displays. A measurement tolerance of +/- 1 - 3 cm is allowed.