WHAT YOU GET: 2 pieces of 150A busbars(red positive and black negative). Each terminal block with 3 stainless steel studs (M6, 1/4inch) and 10 screws (, 5/32inch), modular box design with removable dust cover. easy connection and installation. PREMIUM MATERIALS: Screws and nuts is made of High-quality materials, improved corrosion and rust resistance in salt water or environments. The electric terminal block is made of tin-plated pure electric copper with strong conductivity. Reinforced insulating base+protective cover is made of nylon, prevents accidental short circuits. IMPORTANT PARAMETERS: The black bus bar is connected to the negative pole, and the red bus bar is connected to the positive pole; the rated current of each bolt is 50A, the rated current of the entire electric block is 150A; the current of the auxiliary terminal screw is 20A. The maximum operating voltage is DC 48V and up to 150 amps. WIDE APPLICATIONS: The power distribution block is widely used in 12-48V auto and marine wiring, trucks, RVs, boats, Trailers, and other industrial equipment. EASY TO USE: The terminal bus bar box is convenient to use. You can use screws to fasten both ends where you route your wiring and are ready to go. Keep your wires organized, clean, and more secure. Material: Nylon + metal colour: As Shown Package Contents: 1 set Bus Bar 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.