The product is a set of two Bosch 03178 distributor caps designed to fit various Japanese and domestic inline 4-cylinder engines manufactured between 1968 and 1989. These distributor caps are new old stock (NOS) vintage parts made of black plastic in an unfinished finish. Manufactured in Japan, they come with no warranty and are suitable for use in ignition systems. The caps are compatible with interchange part numbers such as JH59, JH134, E318Z, and others, providing a reliable option for replacing worn or damaged distributor caps in older vehicles.