Pre-wired - This fuse relay box features a pre-wired design, completing half of the connection work and making the entire installation process faster and time-saving. Capacity - This fuse and relay box can hold up to 4 relays and 12 fuses simultaneously, allowing multiple relays and fuses in one unit, keeping your circuit organized and neat. New Installation Design - The front-mounting design allows secure installation in various locations. The waterproof fuse relay block provides a reliable and safe environment for equipment operation and helps maintain a clean connection system. Suitable for use in cars, trucks, boats, and other vehicles. 40A Relay - This 12V automotive relay box includes 4 pieces of 5-pin 40A relays, offering high current handling capability for various applications. Various Size Fuses - This auto fuse block comes with 12 pieces of ATC/ATO blade fuses, including 3 x 10A, 3 x 20A, 3 x 25A, and 3 x 30A fuses, meeting a wide range of circuit protection needs. Relay Type: 40A Relay Fuse Type: ATC & ATO Fuse Way: 4 Way Voltage: 12V Product Shape: Insert Type Color: Black Material: ABS Package Contents: 1 set x Automotive fuse relay box Note: Light reflection and different display settings may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.