The product is a set of 4 DENSO 3534 spark plugs with part number ZXE24HLR7, suitable for Volvo XC90, XC60, S60, V60, S90, XC40, and V90 models. These spark plugs have a voltage rating of 60V and are specifically designed by DENSO for optimal ignition performance in these Volvo vehicles. The OE/OEM part number for these spark plugs is 3534, ensuring compatibility with the specified Volvo models. These high-quality spark plugs from DENSO are essential components in the ignition systems of these vehicles, providing reliable and efficient spark generation for proper engine operation.