Relay Box: This relay box 12V automotive is equipped with 6 pieces of 4 pin 40A relays, provide the highest rating to make its application wider and safer Fuses: This fuse relay box also comes with 12 pieces of ATC/ATO fuses, which include 2 x 10A, 2 x 20A, 2 x 25A, 2 x 30A，2 x 35A, 2 x 40A blade fuses, can meet a wide range of using requirements Pre-wired: This fuse relay box is pre-wired with wires connected in different colors for easy clarification and connection of wires, making the whole connection process faster and less time consuming High Security:The 12V fuse and relay box has an insulated enclosure that prevents most dust and splash water from entering the box for safe use Application:The waterproof fuse relay block is designed to provide a reliable and safe environment for the use of equipment and to keep the connection system neat. It is suitable for automobiles, cars, trucks, boats, etc Relay Box: This relay box 12V automotive is equipped with 6 pieces of 4 pin 40A relays, provide the highest rating to make its application wider and safer Fuses: This fuse relay box also comes with 12 pieces of ATC/ATO fuses, which include 2 x 10A, 2 x 20A, 2 x 25A, 2 x 30A，2 x 35A, 2 x 40A blade fuses, can meet a wide range of using requirements Pre-wired: This fuse relay box is pre-wired with wires connected in different colors for easy clarification and connection of wires, making the whole connection process faster and less time consuming High Security:The 12V fuse and relay box has an insulated enclosure that prevents most dust and splash water from entering the box for safe use Application:The waterproof fuse relay block is designed to provide a reliable and safe environment for the use of equipment and to keep the connection system neat. It is suitable for automobiles, cars, trucks, boats, etc