Features Interlocking Design: The male and female slot interlock design at the edge of each socket makes it easy to connect all relays together. Includes 5Pcs Relay: There are 5pcs 12V 30A automotive relay in the set, and the large quantity will meet your needs for replacement. Perfect in Matching: Suits perfectly for split charging or any vehicle requiring high power relay, ensuring wide range of application. Good ABS and Copper: Consisting of premium ABS and copper material, not likely to malfunction, and very durable for long term using. Simple Installation: Comes with a light weight and a compact size as well, the car relay allows for convenient installation in minutes. Specification: Item Type: Automotive Relay Product Model: JD1912 Material: ABS, copper. Contact Type: Normally Open Outgoing End: Wide foot plug in type. Pins: 4 Pin Coil Voltage: 12V DC Current: 30A Package List:5 x Automotive Relay Note:Large capacity and high current‑carrying capacity, heavy load on off relay. But never exceed its ability to keep the interest rate below 10% to 15%. Package List 5 x Automotive Relay