Keep your vehicle's electrical systems running smoothly with this set of 4 heavy-duty 5-pin automotive relays. Rated at 40 amps with a 12V DC coil voltage, these relays are built to handle demanding applications including electric cooling fans, motor starters, and automotive taillights. Each relay features pure copper contacts in a normally open configuration, delivering reliable conductivity and a long service life. The IP67-rated waterproof housing provides dependable protection against moisture, dust, and harsh under-hood conditions. Installation is straightforward thanks to the screw connector design and plug-in mount, which fits standard 12V automotive relay sockets without requiring any special tools. With a coil resistance of 90 ohms and a wattage of 1.8 watts, these compact relays measure just 1.07 x 1.07 x 0.98 inches, making them easy to fit into tight spaces. Whether you're upgrading your cooling system or replacing a faulty relay, this 4-pack ensures you always have a reliable spare on hand.