Protect Cover & Nuts: Each power busbar comes with a protective cover and nuts to help shield exposed areas, reducing the risk of accidental contact and preventing short circuits. Durable and Safe: The battery terminal block base is made of PC material, with stainless steel nuts and screws, and a copper gasket for stable structure. Each busbar includes a cover to protect connections from damage. Easy to Install: Simply use the screws to fix the battery terminal distribution block in place, connect the wiring to the screw terminals, and tighten the nuts. No complicated steps required. Wide Application: This 4-post busbar is ideal for use in car, RV, yacht, caravan, and ship power systems. Maximum current per circuit depends on the connected wires. Maximum working voltage is DC 48V with a current rating up to 300 Amps. Product Type: BusBar Max Voltage: 300V AC, 48V DC Terminal Studs: 4 x M8 (5/16 inch) Distance between Screw Centers: 145mm Mounting Hole Diameter: 6mm Suitable for: Automotive, car, marine, boat, solar power line renovation, etc. Color: Black & Red Material: PC + Copper + Stainless Steel Package Contents: 1 x Distribution Block Kit Note: Light reflection and display differences may cause slight color variations between the image and actual item. Measurement allows an error of +/- 1-3cm.