The product is a set of 4 Mazda NGK 3787 / ILTR6A8G Spark Plugs, featuring a thread diameter of 14mm and a standard configuration. Made of laser iridium material, these spark plugs are designed for performance and have a manufacturer warranty of 5 years. With a hex size of 5/8, they offer universal fitment and are OE/OEM part number ILTR6A8G. These high-quality spark plugs are a genuine NGK product manufactured in Japan, making them a reliable choice for optimal ignition system performance in your vehicle.