High Quality: Nylon protective cover, heat-resistant and flame retardant, fireproof and dustproof. Brass nickel-plated contact plate, not easy to deform.M6 nickel-plated strut and iron nickel-plated screws, not easy to rust, corrosion-resistant, suitable for any environment. Rugged Construction: Each terminal is equipped with a nickel-plated brass plate for low resistance, maximum conductivity and corrosion resistance. Stainless steel connecting bolts and terminal screws are rust-proof to improve conductivity and ensure good corrosion resistance. Fixed in Order: Marine manifolds include red and black units for positive and negative connections. Diagonal positioning allows for a logical layout and all wiring is clear, keeping the wiring neat and tidy, preventing short circuits caused by tangled cables and saving space. Ring Connection: Distribution blocks with M6 and No. 8 insulated crimp connectors are made of high-quality copper core for good conductivity and durability. When heated, the adhesive melts and the heat-shrink tubing seals to the end of the cylinder, making it watertight. Widely Used: The power distribution terminal block has a maximum voltage of 48 V DC and a maximum continuous current of 150 A DC. It is widely used for 12 V 48 V automotive and marine wiring, cars, pickups, trailers, motor homes, motorbikes, caravans, yachts, boats and more.