1Premium Material: Bus bar is made of premium brass and Abs material, rustproof, high strength, not easy to damage, sturdy and durable. 2Function: Power distribution block with a cover to consolidate, distribute, or protect your electrical system, managing wires and distributing power. 3Professional Design: Professional manufacturing, exquisite workmanship, ensures even and consistent flow and stability, has a long service time. 4Strict Standards: Built to greatly quality control standards, 4 post M6 and 6 wiring screw M4, 125mm center distance, 4mm screw hole distance. 5Wide Application: 4 post power distribution block is ideal for your car, truck, Rv, boat, yacht, solar systems, and other, has a wide range of application.