Made of high quality plastic and zinc alloy materials. Nickel-plated nickel contacts are not easily faded. Wire sizes are as follows: 2 x 0GA/4GA in, 4 x 4GA/8GA out, and 2 x 0GA/4GA in, 4 x 4GA/8GA out. With Red LED indicator, when the fuse is not working,the light will be on.Then you can clearly know if the fuse block is normal. Applications: Widely used in automotive electronics, electrical equipment, automobiles, modified vehicles, environmentally friendly vehicles, buses, ships, etc. Two years hassle-free warranty, we provide 100% perfect customer service, please contact us if you have any question!