High Quality: Premium brass contact plate for better current fer, nylon base provides good insulation, 4 stainless steel studs suitable for a variety of applications. Organized: The power distribution block can help you organize wiring, bring the harness together and reasonably store the wiring inside the vehicle and boat. With Cover: Includes a detachable cover to protect connections from damage and corrosion. safety:Base flame-retardant material plastic, escorts your safety. The power distribution block can handle 250 amps continuous at a maximum of 300V AC or 48V DC. The 3.5mm copper busbar is thicker than other 2.0mm brass busbars, and can actually withstand 250A current. Screws: 6 x 8, Binding posts: 4 x 3/8inch (M10). All of our busbar terminals are made of 304 stainless steel, which is less prone to rust and has a longer service life than other bus bar iron terminals. The special fixing method of our marine busbar and base can withstand large torque, the whole busbar is more stable, and the busbar will not shake when the nut is unscrewed. The fixing method of other people's busbar is not very firm, and the whole busbar will loosen when the nut is unscrewed. Using a pair of black and red battery bus bars for wire management and wiring will keep your circuits organized and reduce the chance of short circuits. Suitable for cars, trucks, caravans, boats and yachts etc. Colour:Black and Red Material:PlasticandMetal Package Contents: 1pair x 12V bus bar (red and black) with screw 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.