Material: The ballast is made of materials that meet strict OEM requirements and its performance matches your car. Function: The H-ID ballast is important because it helps start the bulb and also allows current to flow through the entire bulb so that the light stays on. Another important function is to control the current flowing through the bulb. Installation: Fixed installation, plug and play. The installation is simple and quick, without complicated steps, saving time and effort. A simple process can be successfully installed. No modification, cutting or drilling is required, and it is not easy to fall off. Quality: Made of materials that meet strict OEM requirements, this product offers stable performance and is an ideal replacement option. Note: To ensure you receive the correct item, please confirm that your OEM number matches the one in the description.