[Reliable Quality] The black shell is made of nylon material, which provides 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, ideal for long-term use. [Specification] Size: 1.41 x 0.94 x 0.63 inches (approximately 3.6 x 2.4 x 1.6 cm). This 30A 12V relay is designed to control high-amperage circuits in vehicles, such as headlights, fuel pumps, and cooling fans. [Easy to Use] Suitable 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 reliable component operation. [Application] Compatible with various automotive systems including tail lights, engine compartments, electric cooling fans, electric water pumps, electric fuel pumps, door handle solenoids, trunk solenoids, and other equipment. [Customer Service] This package includes 4 pieces of 12V 30A 5-pin relays. If you have any questions, please and our support team will assist you promptly.