- Complete accessories: This Relay Box Kit includes one relay box, 3 fuses, and 11 terminal blocks. It delivers stable, reliable performance, practical operation, and a long service life. - Ideal replacement for modern vehicles: Many vehicles have sloped engine bays or trunks. The kit uses unique rails to securely mount the high-temperature resistant relay box anywhere for easy installation, holding it firmly in place and properly positioned for quick servicing or replacement of blown relays and fuses. - Easy installation: The rails secure the relay box firmly in place to meet basic circuit needs. Only a few simple steps are required to complete the installation. - PA66 material: Made of high-temperature resistant PA66 material, this relay box is strong and durable, not easily deformed, and resistant to wear. - Use scenarios: Under-hood installation on vehicles with sloped engine bays; mounting in trunks or cargo areas with limited space; upgrading or replacing relays and fuses in passenger cars, trucks, vans, or fleet vehicles requiring reliable, heat-resistant electrical management.