1.1. quality materials and conductivity: tinplated pure electric copper distribution block bus for maximum conductivity and safety. current busbar is reinforced fireproof ABS base, which ensures mechanical strength and durability. Stainless steel bolts and nuts for improved corrosion and rust resistance in saltwater or corrosive environments. 2.2. The rated current of the entire electrical block is 100 A. The max. voltage is 48V DC. The black car power distributor is usually connected to the negative pole, the red is connected to the positive pole. 3.3. Ideal for multiple battery wiring configurations: durable busbars are 4x M5 (3/16'24) bolt terminals, many connection points. 4.4. Easy installation: surface mounting, 2 mounting holes for screws No. 10 (M5). 5.5. Widely suitable for: the terminal busbar is suitable for power supply systems such as 12V48V DC RV, solar panel, car, truck, yacht, boat, etc. Whether you need to consolidate, distribute or protect your electrical system, the DC busbar can collect wiring harnesses and properly store cables in automobiles and boats. 6.6. Gauge cable fit: the busbar is designed for 100 amp and the threaded bolt is M5 (3/16 inch). Each gauge cable works as long as the terminal end has an M5 lug and the combined amp retraction of all connected wires does not exceed 100 amps.