The 4 by 6 inch rectangular diamond cut lens with domed center projector aim is a practical and versatile product that holds an H4 bulb and fits most makes and models. Its unique design ensures a precise and focused light projection, making it ideal for various lighting applications. This product is sold individually, making it easy to replace or upgrade as needed. With its durable construction and universal fit, this lens is a reliable and convenient option for anyone in need of high-quality lighting solutions.