[Reliable Quality] The black shell is made of nylon material, providing electrical insulation, and the pin is made of brass, capable of withstanding both cold and hot conditions. Durable and sturdy construction resists deformation and rust, designed for long-term use. [Specification] Size is approximately 1.41 x 0.94 x 0.63 inches (3.6 x 2.4 x 1.6 cm). This 30A 12V relay is suitable for controlling high-amperage circuits in vehicles, such as headlights, fuel pumps, and cooling fans. [Easy to Use] Designed for standard automotive applications, this motor relay is simple to install. Just connect the relay and wiring—no additional tools required. Easy to use and replace, ensuring components function properly. [Application] Suitable for use with car tail lights, engine compartments, electric cooling fans, electric water pumps, electric fuel pumps, door handle solenoids, trunk solenoids, and other automotive equipment. [Customer Service] This package includes 4 pieces of 12V 30A 5-pin relays. If you have any questions, please and our team will respond promptly.