Keep your vehicle's electrical systems running smoothly with this set of 4 heavy-duty 12V automotive relays. Each 5-pin relay is rated at 40 amps (NO) and 30 amps (NC), making them well-suited for controlling electric cooling fans, motor starters, automotive taillights, and other high-current applications. Built to handle tough conditions, these relays carry an IP67 waterproof rating, ensuring dependable performance even in wet or harsh under-hood environments. The copper contact material and 12V DC coil with 90 Ohm resistance deliver efficient and consistent power switching. Measuring just 1.07 x 1.07 x 0.98 inches, the compact plug-in mount design allows for quick, tool-free installation. Clearly labeled pin diagrams on each relay make wiring straightforward for both professionals and DIY enthusiasts. Having a pack of four on hand means you're always prepared for replacements or multi-circuit projects.