The product is a set of 4 NGK 5787 Laser Iridium Spark Plugs with the part number ILZKR7B11S. These spark plugs have a thread diameter of 12mm and are made of iridium material. They are designed for gasoline fuel type vehicles and have a standard configuration. The manufacturer part number is 5787, and the interchange part numbers include NGK ILZKR7B11S and ILZKR7B11S. The spark plugs are manufactured in Thailand and weigh approximately 0.5 lbs.