About this item: Waterproof - The fuse and relay box comes with a waterproof and dustproof cover, waterproof silicone cable plugs, and rubber blocks for multi-wire cables, multiple waterproof measures for normal use of relays. Convenient Pre-wiring - This fuse relay box has a pre-wired design, which completes half of the connection work and leaves only the necessary installation processes, making the connection of this relay fuse box much more convenient and easier. Wide Application - The waterproof fuse relay block is designed to provide a reliable and safe environment for equipment use and keep the connection system clean. It is applicable to cars, trucks, ships, etc. 40A Relay - This 12V car relay box will be equipped with 6 pieces of 4-pin 40A relays, providing the highest rating for its application and. Various Sizes of Fuses - This automatic fuse block also comes with 6 pieces of ATC/fuses, which include 1x 5A, 1x 10A, 1x 15A, 1x 20, 1x 25A, and 1x 30A blade fuses, can meet a variety of usage requirements. Fuse Relay Box Set Relay Type: for Relay Fuse Type: ATC & Fuse Way: 6 Way Voltage: 12V Base Material: Flame Retardant Nylon Product Form: Insertion Type Material: Plastic Color: Black Package Contents: 1 x Relay Holder Box Set (Accessories shown in the picture) 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 to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.