The product is a set of 4 DENSO Iridium Spark Plugs with the manufacturer part number 90919-01210. These spark plugs are designed for standard configuration vehicles and have a high-quality iridium material construction. They are compatible with gasoline engines and have a voltage of 12V. The spark plugs come with a 1-year manufacturer warranty and are specifically designed for Toyota vehicles, making them a reliable and durable choice for ignition systems.