The Bosch Ignition Coil Service Kit - 140705 is a comprehensive kit designed for servicing the ignition coils of a car. It includes three essential products that are necessary for maintaining the proper functioning of the ignition system. The first product is a set of ignition coils, which are responsible for generating the high voltage needed to ignite the fuel-air mixture in the engine. The second product is a set of spark plugs, which are responsible for creating the spark that ignites the fuel-air mixture. Lastly, the kit includes a set of spark plug wires, which are responsible for delivering the high voltage from the ignition coils to the spark plugs. This kit is designed to work with a wide range of car models and provides all the necessary components for a complete ignition coil service.