About this item: Waterproof - Fuse and Relay Box comes with waterproof and dust-proof top cover , bottom cover, silicone waterproof wire sealing plugs and rubber blocks for multi-core cables, multiple waterproof measures the normal use of relays.Convenient Pre-wired - This fuse relay box is pre-wired design, which finishes half of connection work, and only leave necessary install processes , makes the connection of this relay fuse box become much more convenient and easier .Wide Application - The waterproof fuse relay block is designed to provide a reliable and safe environment for the use of equipment and keep the connection system clean. It is applicable to cars, trucks, ships, etc.40A Relay - This relay box 12v automotive will be equipped with 6 pieces of 4 pin 40A relays, provide the highest rating to make its application and .Various Size Fuses - This auto fuse block will also come with 6 pieces of ATC/ fuses, which includes 1x 5A, 1 x 10A, 1 x 15A, 1 x 20, 1 x 25A and 1 x 30A blade fuses, can meet a wide range of using requirements.Fuse Relay Box KitRelay Type: for RelayFuse Type: ATC & FuseWay: 6 WayVoltage: 12VBase Material: Flame Retardant Nylon MaterialProduct Shape: Insert TypeMaterial: plasticcolour: blackPackage Contents: 1 x Relay Holder Box set(Accessories as shown in the figure)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.