The product is a set of 4 Denso Iridium Power Spark Plugs with part number IXU22/5308 designed for various car models such as Chevy, BMW, VW, and Fiat. These spark plugs feature a thread diameter of 0.472 inches and a reach of 19.00 millimeters. They have a 12mm thread size and a resistance of 5000 ohms. The spark plugs are direct replacements and are made of iridium material, providing reliable performance and durability. The set is ideal for those looking to enhance their vehicle's ignition system with high-quality spark plugs.